Lichens

To open this post I should let newer readers know that I’m not a lichen expert. Though I do make mistakes I try hard to be accurate when identifying them. I started doing lichen posts because I enjoyed seeing them and I thought you would, too. They’re easy to find because they grow virtually everywhere, and it’s nice to see their bright colors and unusual shapes in winter. Common goldspeck lichen (Candelariella vitellina) for instance, is a beautiful bright yellow, cheery lichen that grows on stone.

Many lichens produce spores as a means of reproduction and that’s what this one was doing when I saw it. The little round bits that sometimes look like the suckers on an octopus are called apothecia, and that’s where the action is. Many lichens, for reasons I don’t know, like to produce spores in winter, so this is a good time to look for them. This lichen in my experience doesn’t often have them, so I got lucky.

Peppered rock shield lichen (Xanthoparmelia conspersa) also likes to grow on stone in full sun and I find a lot of them on old stone walls. They’re a good introduction to lichen study because their brown apothecia are large and easy to see without aid. Lichens are made up of a symbiotic relationship between fungi and algae or cyanobacteria. Technically their apothecia are “fungal reproductive structures, in which the fungus reproduces itself through the production of spores.”

My original thoughts for this post included finding lichens I hadn’t seen before, but then I thought no, I don’t want readers to have to find specific tree species or to have to climb a mountain to see these lichens so I stayed with more easily found lichens, like these pebbled pixie cups (Cladonia pyxidata) I saw growing right beside the road I was walking on. They like to grow on soil or rotting stumps and logs and though very small they grow in groups, so that makes them easier to see.

Though pixie cup lichens are squamulose they have fruticose fruiting structures called podetia. The parts that look like tiny golf tees are its podetia. “Podetia” describes a stalk like growth which bears the apothecia, or fruiting bodies. Some examples might have some almost microscopic reddish dots around the rim of the tiny cup, which are its apothecia. Finally, frucitose means a lichen has a bushy, vertical growth. Since this example has squamules even growing inside the tiny cups it must be a pebbled pixie cup lichen.

You might notice that some of these photos aren’t as sharp as they could be and that’s because I think I’ve worn out another camera. My little Olympus Stylus TG-870 has just about given up the ghost I think, so I’ve had to order a new camera. I hope you’ll bear with me while this issue irons itself out. I think this must be the fourth or fifth camera I’ve gone through in the nearly eleven years of doing this blog, but they have a rough time of it in the woods.

I reminded myself, by taking this photo of a candle flame lichen (Candelaria concolor,) that it is not a great idea to shoot the color yellow in full sun.  But you can see the details, and that’s what matters. You should look for this lichen on the trees next time you go to a shopping center, because it is found on the bark of deciduous trees in open areas. From what I’ve seen it doesn’t mind car exhaust, which is unusual because most lichens are sensitive to poor air quality. Look for the bright color rather than size first. The example seen here was growing on an ash tree and was smaller than a penny.

I find what I believe are rosy saucer lichens (Ochrolechia trochophore) growing on smooth barked trees like maples, and I see them everywhere I go, winter and summer. In fact it’s safe to say that I probably see more of this pretty little lichen than any other. Its apothecia are not subject to cold or dryness, apparently, because they never seem to change. This particular lichen must produce huge amounts of spores.

Script lichens are a good example of how lichens can change according to the season. When I see them in summer, they look like barely noticeable gray spots on trees but in winter their apothecia start to show. The blackish lines are its apothecia, and long apothecia that look like a pair of lips are called lirellae. The grayish part is the body or thallus. This one is very common and easy to find in this area and I believe it is the common script lichen (Graphis scripta.)

Golden moonglow lichens (Dimelaena oreina) fooled me this year. I always thought they would only grow on smooth surfaces like stone benches or gravestones but this year I found them on some very rough stone. This is a pretty lichen that I’ve read can get quite large but I’ve never seen one more than an inch or two across. They don’t seem to change color when they dry out like many other lichens do. This one was producing spores and that’s something I don’t see this lichen do very often.

Scattered rock posy lichens (Rhizoplaca subdiscrepans) like to grow on old stone walls in full sun, but I’ve also found them on mountain tops. Years ago I found a beautiful example on a gravestone and never found another anywhere else. Now I see them everywhere I go so it shows me that I have to train my eyes to see the very small.  

And this example was very small indeed. The orange pad like structures are its apothecia and the roundish gray bits are its body, which in this case are called squamules. What you see here would have easily fit on a penny with plenty of room to spare. Next time you’re near a stone wall take a close look. You might be surprised by what you see.

Sidewalk firedot lichen (Caloplaca feracissima) is a pretty, bright colored lichen that gets its common name from the way it grows on concrete sidewalks. It is a lime lover and concrete sidewalks have lime in them, so when you find it in a stone wall it’s a fair bet that the stone it grows on has limestone in it too. This stone, my favorite “go to” stone to see this lichen, is almost completely covered by it. What is a bit odd about it is how this is the only stone in this wall like it.

A closer look at the sidewalk firedot lichen showed how it is another lichen made up of tiny specks, some of which are its dry apothecia. They are very small so you really need a loupe or a macro lens to see them clearly.

Another of my favorite lichens is the star rosette (Physcia stellaris) because when you look at it you often find that it appears to be looking back, with its big, dark apothecia. But they aren’t always dark; sometimes they’re gray and sometimes they appear more blue than gray. That’s because though they are actually dark brown, they have a powdery wax coating that can cause their color to change depending on the light. Plant parts with this powdery waxy coating are said to be pruinose and a good example of it is the “bloom” on blueberries, grapes, plums, and other fruit. On this day this example’s apothecia didn’t appear to have any pruinose coating at all.

Here was an example that illustrates how a lichen can change due to weather or even over time. That’s why it’s best, when you find some that interest you, to look at them every now and then in different weather conditions to see how they change. Some might not change at all but many do.

The tufted ramalina lichen (Ramalina americana) has a green body (thallus) with flattened strap like branches and white fruiting bodies (apothecia.) They are very susceptible to air pollution and many have died off but oddly, I find them growing in a parking lot surrounded by cars. I’m not sure what that means but generally lichens are a good indicator of air quality. If you see a lot of them in your area that most likely means that your air quality is good.

If you see a tree that looks as if someone threw a bucket of white paint at it you could be seeing a whitewash lichen (Phlyctis argena.) On the other hand, you could be seeing a white fungus called the white stain fungus (Julella fallaciosa.) That’s where looking closely comes in; if you see what look like small black dots or rings in the white field, it is most likely the fungus. Neither the fungus or the lichen will hurt the tree. Just think of them as birds that have found a good place to perch, because that’s all they’re doing.

This tree had me baffled. I thought it was covered with some kind of lichen but I had never seen one this color envelops an entire tree before, so I had to send the photos to my friend who wrote a book on lichens. Not surprisingly he knew right off what it was.

A photo of the tiny, almost invisible apothecia helped with his identification.

You could have knocked me over with a feather when he said that it was my old friend the maple dust lichen (Lecanora thysanophora,) because every one I had seen previously looked like the one in this photo. He said that the individual thalli (the bodies) of these lichens can grow together to cover large swaths of a smooth tree trunk. This is especially true on young maple trees with very smooth bark, which of course is what this young tree was. Lichens always find a way to amaze me, no matter how many of them I see.

This lichen was going to appear here as a mystery lichen but at the last moment I sent photos to my lichen identifying friend and he came back with Ropalospora viridis which has no common name. Since that was the one I had chosen out of his book I was happy to have the confirmation. Lichens can be tough to identify but as I’ve said here so many times before, you don’t have to know its name or even that it is a lichen to appreciate its beauty. That is the most important part; just being aware of and enjoying the beauty that is all around you.

This lichen doesn’t have apothecia. Instead it has bright, lime green soredia, which are tiny balls of cells that break off and start new lichens. Many lichens have asexual means of reproduction and this is one of those. It’s a pretty little thing that I’m sure will be hard to miss now that I’ve seen it.

There is always at least one unknown in my lichen folder and this is today’s example. At first I thought the ghostly white circle on a tree was the fringe of a maple dust lichen, but where was the rest of the lichen? Then I thought it might be slime flux, which is a weeping wound on a tree also called bacterial wet wood. It looks like a wet stain running down the bark and can be white, black, orange, brown and other colors. I’ve been aware of it and have seen it on various trees throughout my life but I’ve never seen what it looks like when it just starts, and I wondered if that was what I was seeing here. In any event both I and my lichenologist friend are baffled by this one, so if you happen to know what it is, we’d really love to hear about it.

I hope you’ll look at and enjoy the lichens in your area. You won’t have to look hard because they are literally everywhere.

For anyone interested here is the ordering information for the lichen book I’ve been speaking of throughout this post. I’m sorry that I couldn’t get it to you in the original post.

From the tiniest grain of sand to the large sun in the sky, all are here to teach us. ~Pam Torres

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Time for a Climb

As I always do at this time of year, I went to visit Pitcher Mountain over in Stoddard. I got there so early in the morning the mist was still in the trees. The mountain was named after the Pitcher family who settled here in the 1700s, and from the treeless summit you have a full 360-degree view. The views are almost always good but when the trees have changed into their fall colors it can be beyond beautiful.

I was surprised to see that the oaks had already turned.

And the beeches as well. This was not what I expected. Obviously fall was moving faster up here than it was down in the lower elevations.

The trail was thick with fallen maple leaves, and all of these signs told me that I was probably too late to see peak color on the summit but no matter; up we go.

It was early morning and the sun was shining, the birds were singing, the forest was beautiful and I had nowhere to be, so what I might find on the summit didn’t concern me.

I had to stop at one point and say hello to a pretty little haircap moss growing beside the trail.

I wanted to see if the moss had produced any spore capsules and it had, as this photo shows. When young the female spore capsule of a haircap moss is covered by a cap called a calyptra which protects it. You can’t see it in this photo because it has fallen off already, but it is very hairy and this is what gives this moss part of its common name. Eventually as the capsule ages it moves from vertical to a more horizontal position and the calyptra falls off. The spore capsule continues to ripen after the calyptra comes off and when the time is right the beaked end cap or lid called the operculum will fall off and release the spores to the wind. As it ages the spore capsule changes from round to four cornered but not quite square, as seen here. I would guess by looking at it that the end cap was nearly ready to fall off. I’ve taken them off before so I could see the tiny, dust like spores. There were so many I wondered why every bit of ground on this planet wasn’t covered in haircap moss.

An Indian cucumber root plant (Medeola virginiana) surprised me by still having berries. They are usually snapped up quickly, by turkeys I believe, since I have accidentally scared the birds away from them when trudging through the woods.

There were lots of clouds in the sky but it was still a beautiful, if cool fall day.

When I turned around and looked back at the way I had come, I could see lots of color.

There was plenty of color along the trail as well. The many bright red blueberry bushes were beautiful.

And so were the blackberry bushes.

And there was the ranger cabin. I wondered who it was that carried all the materials up here to build it years ago. If you unlock the gate down below you can drive to a point but the last few hundred yards would have required hand carrying because of all the rocks and the steepness of the grade. The trail is only one person wide too, so it must have been quite a job. It’s a shame that it isn’t being maintained.

It has always looked to me that there used to be an apple orchard up here and though the trees no longer bear they’re still here. I was surprised to find spring beauties, one of our most beautiful spring wildflowers, growing under this tree one year.

I’ve read that the fire tower is manned when the fire danger is high and I’ve seen people in it but normally it is empty. One day when I was up here they let all the families go up into it, but I kept my feet on the ground. I don’t get along well with heights and I would imagine it must sway a bit in the wind.

Once I reached the summit I saw that I had indeed waited too long to make this pilgrimage, because almost all of the blueberries and other bushes had lost their leaves. They add a lot to the beauty of the place but they aren’t all there is to see. I like cloud shadows, and I had plenty of them to watch. I also had the whole place to myself for a time.

The quality of color depended on which direction you turned. There was quite a lot of close color looking this way. If the blueberries still had their leaves though, it would have been even better.

All the leafless bushes seen here are blueberries and that’s why Pitcher Mountain is known for its blueberry picking. Entire families come from all over to pick. I’ve sat here during blueberry picking season and heard voices coming from out there among the bushes without ever seeing a soul. You hear voices saying things like “This bush is loaded!” or “I need another bucket!” and you wonder, where are they?

I wanted to show you what I call the near hill but it was completely under a cloud shadow, so I sat and waited. At one point, and I think that moment is in this photo, every part of the landscape all around the hill was in full sunshine, but the hill remained dark. I like a challenge so I thought I’d just wander around and wait. By that time the summit was crowded with families. I was happy to see lots of children up here.

While I waited, I wandered over to the bird baths. Since it had rained the night before I wasn’t surprised to see them full. In fact I’ve never seen the biggest one dry, even in drought. I have seen birds bathing in it though.

Something I’ve never seen is a puddle on this part of the summit, but here was a big one. Big enough for the wind to ripple it in fact, and how the wind did blow. It actually moaned and howled through the stairs on the fire tower and two or three of the smallest children cried, afraid the wind would blow them off the mountain. Though I didn’t say anything to the parents their fear was justified; I’ve been almost blown over by big gusts a few times while up here. I was glad their parents were there to comfort them and I was also glad that that I had worn a jacket.

I discovered that mountain cinquefoil (Potentilla tridentata) turns yellow in the fall. If you’re patient all the answers will come.

I returned to view of the near hill several times but all I got was an occasional glimpse before the clouds closed in again. I played this game for over an hour and each time i took a look the break in the clouds quickly closed in again. I became determined that I would get a photo of the hill in full sunshine, so I waited and did some more wandering.

Common goldspeck lichens (Candelariella vitellina) looked like someone had spilled egg yolk all over the rocks. They and other lichens grow profusely up here.

This crustose lichen is very granular and is often busy producing spores, but I didn’t see any of its fruiting bodies (apothecia) on this day. These lichens were once used to dye wool in Sweden but I still wonder how they got them off the rocks. Crustose lichens usually can’t be removed from the substrate they grow on without damaging it in some way, so maybe a chisel was used. It must have been quite a job.

Scattered rock posy lichens (Rhizoplaca subdiscrepans) also grow in great numbers here. The pale orange pad shaped parts are its fruiting bodies (Apothecia,) and the grayish, broken looking part is the body (thallus) of this relatively common lichen. A few years ago I thought they were rare until I started finding them on rocks almost everywhere I went.

Finally the clouds parted and I was able to see what I had been waiting for. There was a surprising amount of color still on the near hil but also a lot of bare trees. My guess would be that all the color comes from oaks and beeches rather than maples. In any event I’m happy that I am able to show it to you. Now that I had the shot, I could go back down to a less windy, flatter place.

You don’t have to wait until you get to the top of a mountain to enjoy the view. ~ Eleanor Brownn

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By An Old Stone Wall

There is an old stone wall in Swanzey that I like to follow in winter because it has a southern exposure, and that coupled with evergreen branches overhead usually means that very little snow is on the ground. This year though, I got there to find that all the pine trees along the wall had been cut so there was snow right up to the wall. It’s still a great place to explore, so the bit of snow I got in my hiking boots didn’t really bother me. The reason the stones look like they do in this photo is because they are almost completely covered by rock greenshield lichens (Flavoparmelia baltimorensis).

Rock greenshield lichens are very common in this area and are another of those bits of nature that you see so often they no longer register, but when you take the time to look closer you find that they are quite pretty. They must like it here because they cover entire lengths of this wall. It had rained all day the day before so all the lichens I saw were at peak beauty.

The bushy rock lichen (Ramalina intermedia) I first found here a couple of years ago has grown quite a lot and there are even smaller ones growing under it now. Lichen communities grow in succession with many varieties of crustose lichens as pioneers. Foliose lichens come next as intermediary species and finally fruticose lichens like this one are considered climax species. What I don’t know is, how much time is between pioneer and climax? Climax communities of lichens are considered “old growth” communities.

The sun tried to come out but the clouds won the battle.

I believe there must have been animals kept here in the past because holes were drilled into stones and steel rods inserted into them to increase the wall height by about a foot and a half. Each rod has a flattened tip with a hole in it and the hole most likely had wire passed through it. It was fairly common practice in New England.  Stone walls were usually too low to be effective and cows and other farm animals often jumped right over them, so their height was increased by adding wire or other materials. You had to pay a fine if your animals escaped and were caught roaming free. They were brought to the town pound and the owner had to pay to get them back plus the cost of feeding them.

As the steel ground against the granite over the years the holes were made bigger so cut nails were driven in beside the rods to keep them straight. The cut nails seen here date the steel rods to sometime between 1800 and 1900, but the wall itself has been here I think since the mid-1700s.

Because it’s so warm near stone walls in the winter plants like to grow along them. Common speedwell (Veronica officinalis) thrives here. This European native is common here and has been used medicinally for centuries. Its leaves have also been used as a tea substitute and I wouldn’t be surprised to find that the early settlers brought it with them.

Mullein (Verbascum thapsus) also does well here along the wall. In fact there is an amazing variety of plants growing on or near this wall. Native Americans used tea made from mullein’s large, gray green furry leaves to treat asthma and other respiratory ailments. It is also said to be useful as a relaxant and sleep aid.

This is a shot of one of the roots of a very old pine stump. They looked to be slowly rotting away but the wave pattern in this one caught my eye. You don’t see things like this every day.

Pixie cup lichens (Cladonia asahinae) grow all along the wall. The tiny little golf tee shaped parts are the fruiting bodies of this lichen. Spores produced in them will be splashed out of the cup by raindrops.  Pixie cups almost always produce large groups of fruiting bodies like these.

Scattered rock posy lichens (Rhizoplaca subdiscrepans) grow all along the wall in sunnier spots. They are quite small and difficult to see without magnification, but it’s worth looking for them because they almost always have their bright orange apothecia showing. They like to grow on stone, especially granite, in full sun.

All of the sudden I’m seeing lots of chipmunks, and here was a chipmunk burrow. These little rodents, bigger than a mouse but smaller than a squirrel, store food for winter in underground chambers and stay underground until spring. In spring they’re usually very hungry, hence all the activity. They love to run along stone walls as well and often follow me through the woods that way, chirping and chucking the whole way.

Some of the stones here are like quilts with such a patchwork of lichens on them.

The most common stone walls in this area are “tossed walls.” Farmers worked from dawn to dusk in Colonial New England and tossed walls required the least amount of time and effort because smaller stones were literally tossed or thrown on top of one another. In the early years getting rid of the plentiful stones quickly and efficiently was more important than enclosing the fields, but this farmer took the time to build a seat into this wall. It’s at the perfect height to sit on (I tried it) and wide enough for two people.

Near the stone seat is an iron ring in the wall where a horse could be hitched. Both the stone seat and hitching ring are in the shadiest part of this property so it makes perfect sense that this would be the place to sit and have lunch.

The farmer could even have had black raspberries for lunch, in season. They grow in several places along the wall.

As time passed barbed wire was often added to stone walls to keep animals in or out. This wire grew out of the very center of a pine tree, so it was tacked onto the tree quite a while ago. Running their saw into steel wire is one of a wood cutter’s worst nightmares come true but many things have been found inside trees, from axe heads to gravestones to even bicycles.

This chain hook is one of my favorite bits of antique iron work that I find here. A link from a chain would have been hooked over it and then another link hooked over a similar hook a certain distance away. Chains were (and are) often hung across roads or driveways as a way to say “no admittance.”  What I like about this example is the way the blacksmith tapered the hook over its length and finally ended it in what looks like a dragon’s tail. You can still see the marks of the hammer all along its length. It’s a beautiful thing and if I owned it, especially since my grandfather was a blacksmith, it would be considered a work of art.

Even in silhouette pokeweed (Phytolacca americana) can be readily identified by the long stalks that held its berries. What surprised me by these plants is how they were still standing. Pokeweed stems weaken quickly at ground level and it doesn’t usually take much snow to bring them down. Native Americans used the plant medicinally and also used the red juice from its berries to decorate their horses. Recently scientists found that the red dye made from the berries can be used to coat solar cells, increasing their efficiency.

A small oak tree hung on to its fall color and was beautiful on this cloudy, wet day. I loved seeing its bright cheery colors.

The truth is not in the touch of a stone, but in what the stone tells you. ~Rene Denfeld

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Lichens

I’ve left lichens alone up to this point this year because of the drought. Lichens, to be at their best photogenically at least, need rain and when they don’t get it they can change their appearance sometimes quite dramatically. Some lichens however, like the common goldspeck lichens seen above, seem to change very little no matter what the weather.

Common goldspeck lichens are very pretty and grow on stone. These examples were growing on 200 year old slate headstones in a cemetery, which is a great place to find lichens.

Not surprisingly when you get close enough you find that common goldspeck lichens look like tiny gold specks. This one happened to be producing spores and you can see that by the little round things that look like octopus suckers scattered here and there. They are the lichen’s apothecia and they are very rarely seen on this lichen. If you took a common pin and poked it through a piece of paper and then looked through the hole you’d have a fairly good idea of the size of most of those little specks.

Another rock loving lichen is the sidewalk firedot lichen (Caloplaca feracissima,) so called because it is a lime lover and grows on concrete sidewalks, which have lime in them. When you see it in a stone wall it’s a fair bet that the stone it grows on has limestone in it too. This stone is almost completely covered by it.

A closer look at the sidewalk firedot lichen showed how it is another lichen made up of tiny specks, some of which are its dry fruiting bodies (apothecia).  

I wanted this post to be about showing you how lichens can change their appearance, and one that illustrates this well is the star rosette lichen (Physcia stellaris). This is how it might appear when it is very dry, with apothecia that appear very gray. The apothecia of this lichen are actually dark brown but they have a powdery wax coating that can cause their color to change depending on the light. Plant parts with this powdery waxy coating are said to be pruinose and a good example of it is the “bloom” on blueberries, grapes, plums, and other fruit. The coating reflects light and protects what it coats from the sun. Depending on the angle of the light these apothecia can appear blue, gray, brown or black. That’s why it pays to visit lichens several times.

Here, in a photo taken previously, the star rosette lichen’s apothecia appear blue-gray and that could be either because of the light or the fact that it had rained recently when this photo was taken.

The only thing that seems to change about this lichen is the amount of apothecia it has. On this very dry day it still had so many you could barely see its body (thallus). I believe it is a Powdery sunburst (Xanthomendoza ulophyllodes) lichen, which is very pretty. Unfortunately it is also relatively rare in this area. I’ve only found it on two or three trees in one location. This one is about 3/4 of an inch across.

Here is the same powdery sunburst lichen that appeared in the previous photo, but this is what it looked like three years ago. It clearly illustrates why, if you’re going to study lichens, you need to visit them several times over a period of time if you would know them well.

Pink earth lichen (Dibaeis baeomyces) is one that I have seen no changes in whatsoever after several years, This pretty little lichen closely resembles bubblegum lichen (Icmadophila ericetorum.) One of the differences between the two is the length of the stalks that the plump pink apothecia sit on. They are longer on bubblegum lichens than they are on pink earth lichens. Both are beautiful things that are rarely seen in this area. The whitish thallus, or body of the lichen, grows on soil; usually on dry acidic soil near blueberry and sweet fern plants. It can sometimes have a bluish cast as well.

Scattered rock posy lichen (Rhizoplaca subdiscrepans) is both beautiful and unusual with its brain like body and orange fruiting bodies. This lichen’s orange apothecia can disappear when it is dry so I was surprised to find them this time. This one was growing on stone in full sun. This lichen is fairly common and I find it both on mountain summits and in the lowlands.

The golden moonglow lichens (Dimelaena oreina) that I see are usually about an inch across but they can get much bigger. The ones I know grow in full sun on granite and don’t seem to change color when they dry out like many other lichens do. This one was producing spores and that’s something I don’t see this lichen do very often. This was an odd example because it had another foliose lichen growing in its center. If you spend much time in cemeteries you have probably seen this pretty lichen, because it seems to like growing on smooth, polished stone, especially granite. It is a crustose lichen and crustose lichens are very determined, so removing it from a gravestone would be a challenge. When lichens grow on glass the acids in them can actually etch the glass and this is a problem in the big European cathedrals, especially. I would think the same would be true for polished stone.

Rosy saucer lichens (Ochrolechia trochophore)seem toprefer growing on smooth barked trees but some like this one don’t seem to care and will form themselves to whatever shape the bark they grow on happens to have. I probably see more of this pretty little lichen than any other. It’s apothecia are not subject to cold or dryness, apparently; they are visible in winter or summer.

Peppered rock shield lichen (Xanthoparmelia conspersa) likes to grow on stone in full sun and I find a lot of them on stone walls. They’re a good introduction to lichen study because their brown apothecia, where their spores are produced, are large and easy to see without aid. Lichens are made up of a symbiotic relationship between fungi and algae or cyanobacteria. Technically apothecia are “fungal reproductive structures, in which the fungus reproduces itself through the production of spores” This is not the only way that lichens reproduce, but it is common and the apothecia are often beautiful and well worth watching for.

Here is a closer look at those apothecia. Note the different shades and shapes, all on the same lichen. They wrinkle up a bit when dry.

Dog or pelt lichens will grow on soil, rotting wood, or stone as this one was. The example pictured is I believe,  the scaly pelt lichen (Peltigera praetextata), and I arrived at that identification only with the help of a lichen expert. These lichens are associated with mossy areas because the mosses provide the moisture that they need. Since there are about 100 species of foliose lichens in the family Peltigeraceae they can be tough to pin down. It is a foliose lichen because it is lobed, or leaf like. The upper part of the body (Thallus) is undulating or veined in this case. This lichen is large and easy to see. It is also probably quite old.

What sounds most plausible to me about the origin of the name “dog lichen” are the white “roots” on the white underside of the lichen body. They are fang like and called rhizines. On some lichens they can be quite bushy, and on others they are narrow and thin. They are one of the identifying characteristics of dog or pelt lichens, so you should always try to get a look at them if you can. Often the edges of the lobes will curl up, revealing them. In this area these are relatively rare. I’ve seen them only in two places.

It originally took me quite a while to figure out what this lichen might be called but its green body (thallus) with flattened strap like branches and white fruiting bodies (apothecia) led me to finally settle on the tufted ramalina lichen. Then my lichen expert friend told me that it is now known as Ramalina americana.  A lichen guide from 1902 says this lichen is “very common in New England” but I had never seen it. My knowledgeable friend tells me that is because it was nearly wiped out by pollution, and that tells me that our air here in New Hampshire must be very clean. If you see lots of lichens where you live it’s probably fair to assume the same.

Here is a closer look at the Ramalina lichen’s apothecia. They’re very different from most lichens I see.

Leafy (foliose) lichens that look like this can be difficult to identify but I believe this one is the fringed wrinkle lichen (Tuckermanopsis americana). They are one of the easiest to find because they fall from the trees and litter the ground on virtually any trail you follow in this area. They can be difficult to identify because they change color so readily. I’ve seen them even look pure white when very dry. This one was found on a rainy day so I know its colors are true. The brown, roundish bits with dots (pycnidia) around the edges are its apothecia, and they can be very pretty. This could also be the variable wrinkle lichen (Tuckermanopsis orbata), which is a good name for a very pretty but variable lichen.

A lichen common to stone walls is the sulfur dust lichen (Chrysothrix chlorina.) It’s very yellow and hides under overhangs so it doesn’t get rained on. At least I think that’s why I always find it tucked away like this, but this is odd behavior for a lichen because they usually like a lot of rain and sunshine. It seems as if this one would rather have water run down the stone to it than have raindrops land directly on it. Sulfur dust lichens are kind of granular in texture. If you’re lucky you can sometimes find them with fruiting bodies (apothecia) but more often than not I see them when they aren’t producing spores.

NOTE: My lichenologist friend has pointed out that the correct scientific name for this lichen should be Psilolechia lucida, which is also called sulfur dust lichen. Apparently Chrysothrix chlorina is quite rare in this area.

Some lichens, like the script lichen show above, seem to only produce spores when the weather is cold. Though there are apothecia on this lichen you can barely see them; in the summer you can look at trees that are covered with script lichens and see nothing but grayish white spots on the bark.

But in the winter script lichens come to life and will be covered with squiggly “script” which can often be very beautiful. This is why one of my favorite times to go lichen hunting is in the fall and winter months. Lichen study is not a sprint, it’s a marathon that can sometimes take years to run if you want the medal. Once you become interested in lichens, you’ll find interest and pleasure on every rock, tree and fencepost you see for many years to come.

Smokey eye boulder lichens (Porpidia albocaerulescens) are one of the most beautiful lichens of all in my opinion, but their beauty is fleeting and it depends on how the light happens to fall on them. If you find one it might not look like this one at all. The pretty golden brown body (thallus) of the lichen is peppered with blue apothecia which are colored by the light due to their waxy coating. Take a look at the next photo to see what a simple change in light can do.

This is the exact same lichen we saw in the previous photo; all that is different is the light, and that’s why if you’re at all interested in lichens you really should visit them at different times of year and in different weather. The previous photo was taken when sunlight was falling on it, and this shot was taken when the lichen was in shade. Not only light but dryness can affect the color of many lichens, so make a note of where you find them and then go back when the weather has changed. I think you’ll be amazed by how much they can change, and also by how beautiful they can be.

Here is a lichen that was a learning experience for both myself and my friend the lichen specialist, who just happens to be writing a book about lichens much like the one you see above. There are many things on this lichen that lead to its identity but what I want you to see are its apothecia, which grow in concentric circles and look like little bumps or hills. That would tell most people that this was a concentric boulder lichen but they’d be fooled, just as I was. This photo was taken just after a rain and this lichen was very wet.

Here is the lichen once it had dried. As you can see it has changed dramatically; those little bumps have become cup shaped, and that’s because when wet they swell up and close, and then open again when they dry out. This was a challenge to even a lichen expert so you shouldn’t feel disappointed if you can’t identify every lichen that you see. Some like this one are hard to identify without expert help. Its name is the dusky map lichen (Rhizocarpon reductum) and it will appear in my friend’s lichen book.

If you find yourself interested in lichens maybe you could start like I did; find a particular lichen and simply watch it; maybe on that tree in your yard, or on your daily walk, or at lunch time. They grow virtually everywhere and are not hard to find. So watch “your” lichen and see how it changes. See how different it appears in sun and shade, and when wet or dry. Think about how all of these changes have been going on right there in plain sight all this time without your knowing. This will make you a better student of nature; a better observer. Ask yourself well, if I have missed this, something so obvious, what else might I have missed? Then you will be amazed at what you begin to see.

It is those insignificant things, the things most of us pay no attention to like lichens, liverworts or mosses, that often tell the most about that part of the planet we live on. Lichens, or lack of them, speak about clean air or air pollution. Liverworts speak about clean water or water pollution and mosses speak about soil conditions. These creatures are like canaries in a coal mine and will give advanced warning of any abrupt changes in climate or increases in pollution. All of things on this earth have voices. Nature speaks, but only to those willing to listen, and you listen by simply being there.

We do not see nature with our eyes, but with our understanding and our hearts. ~William Hazlett

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Time for a Climb

John Muir once said “The mountains are calling and I must go.” To be honest I never paid much attention to that statement until the mountains started calling me. And as anyone who has climbed them knows, they do call; they kind of get under your skin and won’t stop calling until you answer them, so last Saturday I drove north to Stoddard to climb Pitcher Mountain. Pitcher Mountain gets its name from the Pitcher family, who settled this land in the 1700s. As mountains go it’s a relatively easy climb, even for someone who uses inhalers as I do. The last time I climbed here was in January. On this day the weather was considerably better and the spring greens and singing birds reminded me what a wonderful thing this life is.

Pitcher Mountain is known for its blueberry bushes; thousand of them grow here and people come from all over to pick them. On this day the buds hadn’t even opened yet, showing what a difference elevation makes. Down in Keene they’re in full bloom.

Hobblebushes (Viburnum lantanoides) grew beside the trail and how very beautiful they were. Though like blueberries they’re also in full bloom in Keene, up here the fertile center flowers hadn’t shown yet. Only the much larger infertile outer flowers had opened.

One of the reasons I wanted to come here was to become more familiar with my new camera. Anyone who knows their way around a camera should be able to use just about any camera handed to them, but they all have their little quirks that take time to learn and iron out. This one doesn’t have image stabilization but the lenses do and that’s something I’ve never encountered. On this day the sun was bright and the contrast high, and that’s a challenge for any camera but I thought this one performed reasonably well as this shot of a wild sarsaparilla plant (Aralia nudicaulis) and its shadow shows. The light green oval leaves belong to Canada mayflower, which will be blooming soon.

My first stop along the trail is always the meadow, where if you look behind you, you can often find a good view of Mount Monadnock over in Jaffrey. It was fairly good on this day, I thought.

The meadow is also where you get your first inkling of how high up you are. The views seem to go on forever.

The meadow is large and sometimes you can find it filled with beautiful Scottish highland cattle. I’ve often thought that they must have the best views of anybody who comes here.

The trail is in a U shape and you take 2 left turns to reach the summit. After the meadow the trail, which is actually a road used by the forest rangers, gets very rocky. There are also lots of exposed roots so if you come here you would do well to wear good hiking boots with plenty of ankle support.

I was stunned to see spring beauties blooming (Claytonia virginica) up here because I’ve climbed this mountain more times than I can remember and I’ve never seen them before. My timing was off, that’s all, and I might have missed them by a day or a week. There was a nice little colony of them in this spot just below the summit. Tucked in snug they were protected from the worst of the wind.

Violets and strawberries grew along the trail and even down the center of it, where many had been stepped on.

The fire tower, manned on occasion, loomed at the summit. This is the second tower on this spot; the first burned in one of the largest forest fires this region has ever seen. That’s why I call it a monument to irony.

The old fire warden’s cabin still stood solidly but there was something different about it.

The difference was a gaping black hole where the last time I was here a board covered the window. It looked like vandals had been here but with so many people climbing this mountain I can’t imagine them getting away with it.

I don’t condone vandalism but realistically bears have been known to break into cabins countless times in this area so it’s anyone’s guess as to how this happened. I wasn’t about to pass up what was probably an only chance to see inside a ranger’s cabin though, so I turned on the flash and took a couple of photos. It looked like it had been furnished in the 1940s, and that was no surprise. I’m assuming there was no running water here because there is a privy in the back, but there was electricity.

If when you reach the tower you turn almost 180 degrees you’ll see another decent view of Mount Monadnock. You can also see the meadow in this view. On this day it was so gusty up here I could hardly stand still. I wanted to crouch on the ground so the wind couldn’t catch me.

But in a way the wind was welcome because it blew away all the black flies that had plagued me all the way up the trail. For those unfamiliar with them black flies are very small biting insects that appear for a few weeks in spring, hatching out of clean running water unlike the mosquito, which hatches out of still, stagnant water. Black flies feed on the blood of mammals for nourishment and they usually come in swarms. Bug spray helps keep them away.

What I call the birdbaths are natural depressions in the stone. With all the rain we’ve had I doubt they’ve been dry a day in the past two months. I once sat and watched a dark eyed junco take a bath here, and I was able to get a few shots of it splashing around. The blue of the sky deepens as it is reflected in these pools and it makes a simple puddle as beautiful as any jewel.

There are lots of lichens growing on the rocks of the summit and one of my favorites is the scattered rock posy (Rhizoplaca subdiscrepans.) They can be quite small and difficult to see without magnification, but it’s worth looking for them because they almost always have their bright orange apothecia showing. They like to grow on stone, especially granite, in full sun. They don’t seem to change their color when they dry out like many other lichens do.

I always tell myself that I’m going to come up here with a compass and a topographical map so I can name all of the surrounding mountains but I never do. I don’t suppose it’s that important anyway. I’d rather just sit and look around, especially when I have the whole mountain to myself as I did on this day. I expected it to be crowded up here but there wasn’t a soul in sight. I wondered if the flies kept people away.

It’s hard to tell from these photos but there is still snow on the ski slopes over there in Vermont.

I stayed on the summit for awhile trying different things with the new camera until my legs felt less rubbery and then I hit the trail again. I don’t know why going down always seems harder than going up, but my legs usually let me know that they aren’t thrilled by it.

The meadow is just to the left of the trail in that previous shot and as I looked out into it I thought a highland cattle calf had somehow gotten loose and was in the meadow eating grass but then wait a minute; that wasn’t a calf. As soon as it looked at me and sniffed the air with its snout I knew it was a black bear. And it was another big one. Though it might look far away in this photo it could have reached me in seconds. Black bears can move incredibly fast; 50 feet per second in fact, so running from one is pointless.

I’ll be the first to say that this is one of the worst photos I’ve ever shown on this blog but you can clearly see the roundish ears and long tan snout of a bear. You don’t have much time to fiddle around with a camera when a bear is staring at you like this and I didn’t have the zoom lens with me anyway, so I just took a couple of quick shots. I just went through this with another bear in Westmoreland and that one didn’t scare any more than this one did. It stood and stared and sniffed, just like this one. And just like that time once again I was the only human around, carrying no bear spray and with only one way out. Luckily this one turned into the forest while I wondered what I was going do if it started toward me, so I hoofed it back down the mountain somewhat faster than I usually do, slipping on loose stones and tripping over roots the whole way. It’s hard to walk downhill when you’re looking back over your shoulder I’ve discovered, and I don’t recommend it.

Nature, even in the act of satisfying anticipation, often provides a surprise. Alfred North Whitehead

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Lichens That Grow on Stone

Since I recently did a post about lichens that grow on trees I thought I’d do one on lichens that grow on stone. Though there are lichens that can grow on wood or stone most of the ones I know seem to prefer one or the other. In fact the ones I know seem very fussy about where they grow, even down to the species of tree or stone. The lichen in this first photo is not that fussy though, so it will even grow on sidewalks, and that’s how the name sidewalk firedot lichen (Caloplaca feracissima) came about. Though I’ve seen it on concrete once or twice in the past I almost always see it on lime rich stones. It’s a pretty orange color and it can get quite big. This one is as big as a car tire.

Another lichen that can get quite big is the peppered rock shield lichen (Xanthoparmelia conspersa) but this example must have just gotten started because it was quite small and had few apothecia. This lichen likes to grow on stone in full sun and I find a lot of them on stone walls. They’re a good introduction to lichen study because their brown apothecia, where their spores are produced, are large and easy to see without aid.

Lichens are made up of a symbiotic relationship between fungi and algae or cyanobacteria. Technically apothecia are “fungal reproductive structures, in which the fungus reproduces itself through the production of spores” This is not the only way that lichens reproduce, but it is common and the apothecia are often beautiful and well worth watching for. The beautiful brown ones in the photo above belong to the peppered rock shield.

Some lichens are very easy to identify because there aren’t many others that look like them, and the toadskin lichen (Lasallia papulosa) is one of those. Toadskin lichens show color changes when they dry out like many other lichens. When wet it is pliable and pea green and when dry it becomes crisp and ash gray like the above example. Toadskin lichens get their common name from their many “warts.” They attach themselves to stone at a single point that looks like a belly button, and that makes them umbilicate lichens.

This is the very same toadskin lichen as the one in the previous photo. You can easily see the dramatic color change between this day when it was wet and when it was dry in the previous shot.

Rock tripe lichen (Umbilicaria mammulata) is a relative of the toadskin lichen but it doesn’t turn gray when it dries out. Instead it gets brownish and curls up. It is very pliable and rubbery when it’s moist, but once it dries out it becomes crisp like a potato chip. The Umbilicaria part of the scientific name comes from the Latin umbilicus, meaning navel. This is where another common name, navel lichen, comes from and points to how, like the toadskin lichens, they attach themselves to stone with a single attachment point that looks like a navel. It sticks itself to stone by way of this single, navel like attachment point and the rest of the lichen hangs from this central point, much like a rag hanging from a peg.

Here is what rock tripe lichens look like dry. You can see the back of it, which is black and pebble textured. Rock tripe is edible and eating it has saved the lives of people who were lost and starving in the past. Though I imagine they must taste like old rubber, these lichens were a source of emergency food for Native Americans and saved the lives of many an early settler. Even George Washington’s troops are said to have eaten rock tripe to survive the brutal winter at Valley Forge in 1777.

Rock greenshield lichens (Flavoparmelia baltimorensis.) Look like melted candle wax to me. They are very common in this area and are another of those bits of nature that you see so often they no longer register, but when you take the time to look closer you find that they are quite pretty.

If you happen to see a stone that looks like it has sprouted gray hairs you might want to take a closer look, because there’s a good chance you’re seeing a Cladonia lichen.

There are many Cladonia lichens including the well-known pixie cups, but I think these were peg lichens (Cladonia sobolescens.) Peg lichens are also a large group, with split pegs, thatched pegs, powdery pegs, etc., but these seem to fit the description of what the book Lichens of North America calls simply peg lichens. The “peg” is called a podetium and it is topped by brown apothecia.

Here is a closer look at the tiny tan / brown apothecia that sit atop the pegs. These are where the lichen’s spores are produced. They are so small that I wasn’t able to see them but luckily the camera could.

This peg lichen is a squamulose lichen, which means it is scaly, but it is also foliose, or leafy. Squamules are the small leafy, lobed growths that are at the base of the tiny peg shaped podetia. A podetium is an upright secondary thallus in Cladonia lichens. It is a hollow stalk extending from the primary thallus. Podetia can be pointed, club like, cupped, or branched in shape and may or may not contain the ascocarp, which is the fruiting body of the lichen. If the asocarp is bowl shaped it is an apothecium. In this peg lichen the podetia are not branched and the leafy squamules are rounded and grayish green to brown, with white undersides. The quality of these photos isn’t great but the various parts of this lichen are very small. I think they do show enough to make a fairly good identification but if I’m wrong I hope someone will let me know.

Scattered rock posy lichens (Rhizoplaca subdiscrepans) can be quite small and difficult to see without magnification, but it’s worth looking for them because they almost always have their bright orange apothecia showing. They like to grow on stone, especially granite, in full sun. They don’t seem to change their color when they dry out like many other lichens do. I’ve seen this pretty lichen even on mountain tops.

Here is a closer look at those pretty rock posy apothecia. The ones I’ve seen are never shiny. They always have a kind of matte finish.

Common goldspeck lichens (Candelariella vitellina) are uncommonly beautiful. Look for this bright yellow crustose lichen on stone. especially slate. I see it on older gravestones quite often. It shouldn’t come as a great surprise that, at high magnification, the body of the common goldspeck lichen looks like it’s made up of tiny golden specks. The book Lichens of North America describes the body of this lichen as “little cushions of flattened granules.” This lichen is sometimes sterile, with no fruiting bodies present, but this one had a few. Crustose lichens form crusts that tightly adhere to the substrate that they grow on and usually can’t be removed without damaging it.

The golden moonglow lichens (Dimelaena oreina) that I see are usually about an inch across but they can get much bigger. They grow in full sun on granite and don’t seem to change color when they dry out like many other lichens do. The one in the photo was producing spores and that’s something I don’t see this lichen do very often. If you spend much time in cemeteries you have probably seen this pretty lichen, because it seems to like growing on smooth, polished stone, especially granite. It is a crustose lichen, so removing it from a gravestone would be a challenge. When lichens grow on glass the acids in them can actually etch the glass and this is a problem in the big European cathedrals, especially. I would think the same would be true for polished stone.

Another lichen common to stone walls is the sulfur dust lichen (Chrysothrix chlorina.) It’s a very soft, pale yellow and hides under overhangs so it doesn’t get rained on. At least I think that’s why I always find it tucked away like this, but this is odd behavior for a lichen because they usually like a lot of rain and sunshine.

Dog lichens (Peltigera) are good example of lichens that will grow on soil, rotting wood, or stone as this one was. Dog lichens are associated with mossy areas because the mosses help provide the moisture that they need. It is very thin and pliable. It is also a foliose lichen because it is lobed, or leaf like. The upper part of the body (Thallus) is undulating or veined on this example. This lichen is large and easy to see. It is also probably quite old.

Here is another look at the dog lichen. They’re much bigger than most other lichens. I’d guess this one is about the size of a 45 RPM record, if anyone can remember those.

The underside of a dog lichen is often bright white as this one was. They also have small hairs called rhizines which help them cling to whatever they’re growing on.

Smokey eye boulder lichen is a favorite lichen of mine. The blue color seen in the above photo is caused by the way light reflects off a waxy coating on the fruiting bodies, which is very similar to the “bloom” found on plums, blueberries, and grapes. In addition to blue it can also appear black or gray depending on which direction the light happens to be coming from.  The greenish-gold background color is the color of the body (thallus) of this crustose lichen. It’s a very beautiful thing and I hope you’ll take the time to look for it and all of the other beautiful lichens out there.

There is no absolute scale of size in nature, and the small may be as important, or more so than the great. ~Oliver Heaviside

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Lichens

As the leaves fall there is much revealed in the forest that was hidden just a short time ago, and lichens are a big part of that revelation. Lichens are all around us but they’re one of those things that are so easy to miss unless we happen to be looking for them. Most people seeing this photo would probably say “Oh yes, I see lichens all over the stones in the stone wall.” But what about the tree? That’s a shagbark hickory tree and they have gray, not white bark. The white is a lichen called, appropriately enough, whitewash lichen (Phlyctis argena.) This lichen is usually found on the bark of hardwood trees and is fairly common. It makes the tree look as if it has been painted white, and that’s where its common name comes from. They can be greenish white, silvery, or bright white.

But you wouldn’t have been wrong in pointing out the lichens on the stone wall because it is covered with them, among them rock greenshield lichens (Flavoparmelia baltimorensis.) This lichen always looks like melted candle wax to me. It is very common in this area and is another of those bits of nature that you see so often they no longer register.

Peppered rock shield lichen (Xanthoparmelia conspersa) likes to grow on stone in full sun and I find a lot of them on stone walls like the one pictured in that first photo. They’re a good introduction to lichen study because their brown apothecia, where their spores are produced, are large and easy to see without aid. Lichens are made up of a symbiotic relationship between fungi and algae or cyanobacteria. Technically apothecia are “fungal reproductive structures, in which the fungus reproduces itself through the production of spores” This is not the only way that lichens reproduce, but it is common and the apothecia are often beautiful and well worth watching for.

Another lichen common to stone walls is the sulfur dust lichen (Chrysothrix chlorina.) It’s very yellow and hides under overhangs so it doesn’t get rained on. At least I think that’s why I always find it tucked away like this, but this is odd behavior for a lichen because they usually like a lot of rain and sunshine.

Sulfur dust lichens are kind of granular in texture. If you’re lucky you can sometimes find them with fruiting bodies (apothecia) but more often than not I see them when they aren’t producing spores, like this example.

If you spend time walking along old stone walls eventually you’ll see a stone with a splash of bright orange on it and it will probably be the sidewalk firedot lichen (Caloplaca feracissima,) so called because it is a lime lover and grows on concrete sidewalks, which have lime in them. When you see it in a stone wall it’s a fair bet that the stone it grows on has limestone in it too. This stone looks like granite to me but it is almost completely covered by it.

A closer look at this example of the sidewalk firedot lichen showed it was made up of mostly irregularly shaped fruiting bodies, so it was making plenty of spores. It was raining just a short while before I took this photo so it was also still wet. Lichens are at their best when they are wet because that’s when they’ll show their true colors and size, so that’s when serious lichen hunters look for them. A misty or drizzly day is perfect.

I know of an old stump that has more British soldier lichens (Cladonia cristatella) growing on it than I’ve ever seen in one place. Old rotted logs and stumps are the perfect places to find them and their bright red color makes them relatively easy to spot.

Even I can see this shade of red, and I’m colorblind.

If you see a tree with growths like this on it you really should take a closer look, because there are some amazing things going on here.

One of the things going on in the tree in the previous photo is what is happening on this star rosette lichen (Physcia stellaris.) Its apothecia are a good example of how colors can change, even on the same lichen. This lichen has dark brown apothecia that are often pruinose. Pruinose refers to the white, waxy, powdery coating on the apothecia. You’ve no doubt seen examples of this waxy “bloom” on blueberries and plums. I’ve noticed by watching lichens that have pruinose apothecia that the coating can reflect light in different ways, sometimes appearing gray and at other times more blue, and sometimes even black. The apothecia on this lichen show a range of colors, from brown to light blue. The way the sunlight strikes it has a lot to do with its colors, so sometimes you have to visit a lichen more than once to understand it.

Common goldspeck lichens (Candelariella vitellina) are uncommonly beautiful. Look for this bright yellow crustose lichen on stone, in this case slate. It’s a very artistic lichen and I like the patterns that it makes. I see it on gravestones quite often. It shouldn’t come as a great surprise that, at high magnification, the body of the common goldspeck lichen looks like it’s made up of tiny golden specks. The book Lichens of North America describes the body of this lichen as “little cushions of flattened granules.” This lichen is sometimes sterile, with no fruiting bodies present, as this one appeared to be. Crustose lichens form crusts that tightly adhere to the substrate that they grow on and usually can’t be removed without damaging it.

The golden moonglow lichens (Dimelaena oreina) that I see are usually about an inch across but they can get much bigger. They grow in full sun on granite and don’t seem to change color when they dry out like many other lichens do. The bigger one in the photo was producing spores and that’s something I don’t see this lichen do very often. If you spend much time in cemeteries you have probably seen this pretty lichen, because it seems to like growing on smooth, polished stone, especially granite. It is a another crustose lichen, so removing it from a gravestone would be a challenge. When lichens grow on glass the acids in them can actually etch the glass and this is a problem in the big European cathedrals, especially. I would think the same would be true for polished stone.

Bright yellow-orange poplar sunburst (Xanthomendoza hasseana) is a beautiful lichen with its large disc shaped, sucker like fruiting bodies (apothecia) which are almost always showing. It’s found on tree bark and provides a lot of color in winter when there are no flowers to see. The example shown here was about as big as a penny, or about .75 inches across.

Another sunburst lichen, the elegant sunburst (Xanthoria elegans) was exposed to ultraviolet radiation, cosmic radiation, and the vacuum of space for one and a half years and when it was brought back to earth it grew on as if nothing had happened. Many believe that lichens are virtually indestructible and are therefore as close to immortal as any earth based life form can be.

Pink earth lichen (Dibaeis baeomyces) closely resembles bubblegum lichen (Icmadophila ericetorum.) One of the differences between the two is the length of the stalks that the plump pink apothecia sit on. They are longer on bubblegum lichens than they are on pink earth lichens. Both are very beautiful things that are rarely seen in this area. The whitish or grayish thallus, or body of the lichen, grows on soil; usually on dry acidic soil near blueberry and sweet fern plants. It can sometimes have a bluish cast as well.

Here’s a closer look at the apothecia on the pink earth lichen. You can also see the stalks that support them.

Scattered rock posy lichens (Rhizoplaca subdiscrepans) can be quite small and difficult to see without magnification, but it’s worth looking for them because they almost always have their bright orange apothecia showing. They like to grow on stone, especially granite, in full sun. They don’t seem to change their color when they dry out like many other lichens do. I’ve seen this pretty lichen even on mountain tops.

Some lichens are very easy to identify because there aren’t many others that look like them, and the toadskin lichen is one of those. Toadskin lichens show color changes like many other lichens. When wet it is pliable and pea green and when dry it becomes crisp and ash gray. This example hadn’t completely dried out but it was on its way, even though it had rained that morning. Toadskin lichens get their common name from their many “warts.” They attach themselves to stone at a single point that looks like a belly button, and that makes them an umbilicate lichen. This toadskin is very special, because it is the only one I’ve ever seen that wasn’t on a hill or mountain top. It grows on a boulder at the very water’s edge of a lake and I’m very happy that I found it now that hill climbing is getting more difficult. Now at least I’ll still be able to see these beautiful little things without having to struggle to reach them, if it comes to that.

Smokey eye boulder lichens (Porpidia albocaerulescens) are one of the most beautiful in my opinion, but their beauty is fleeting and it depends on how the light happens to fall on them. If you find one it might not look like this one at all. The pretty golden brown body (thallus) of the lichen is peppered with blue apothecia which again, are colored by the light. Take a look at the next photo to see what a simple change in light can do.

This is the exact same lichen we saw in the previous photo; all that is different is the light, and that’s why if you’re at all interested in lichens you really should visit them at different times of year, as I said when we looked at the star rosette lichen. The previous photo was taken when sunlight was falling on it, and this shot was taken when the lichen was in shade. Not only light but dryness can affect the color of many lichens, so make a note of where you find them and then go back when the weather has changed. I think you’ll be amazed by how much they can change, and also by how beautiful they can be.

There is a low mist in the woods—it is a good day to study lichens. ~Henry David Thoreau

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Following an Old Stone Wall

Two of my great loves are history and botany and one of the best ways I know of to get a good dose of both is by following stone walls. This particular wall is in Swanzey, New Hampshire and surrounds what I believe is the oldest cemetery in town. Revolutionary war soldiers are buried here so it certainly has some age.

Right off I spotted some sulfur dust lichen (Chrysothrix chlorina.) It’s very yellow and hides under overhangs so it doesn’t get rained on. At least I think that’s why I always find it tucked away like this, but this is odd behavior for a lichen because they usually like a lot of rain and sunshine.

Sulfur dust lichens are kind of granular in texture. If you’re lucky you can sometimes find them with fruiting bodies (apothecia) but more often than not I see them when they aren’t producing spores.

There are stone walls called “lace walls” which are built of a stack of stones just one stone wide, and which are full of holes that make them look like lace, but this is a tossed wall sometimes three or four stones wide and it was built to keep animals, probably sheep, out. There were no holes when it was built but there are now, as this photo shows. I can’t explain how it happened but I’ve built enough dry stone walls to know that building a hole like this one into a tossed wall would be close to impossible. In a tossed wall the stones are literally just tossed on top of one another. The object wasn’t to build a pretty wall; it was to get rid of the stones as quickly and efficiently as possible. I think a stone must have fallen or been taken out of the wall to create such a hole.

There are a lot of tree stumps along the wall and some of them, like the one above, are very old. Not only was this one covered with moss and lichens, it also had birch trees growing out of it. Stumps like this are always worth a second look.

The old stump had more British soldier lichens (Cladonia cristatella) growing on it than I’ve ever seen in one place. Old rotted logs and stumps are the perfect spots to find them.

Even I can see this shade of red, and I’m colorblind.

A large pile of sand at the base of another hollow tree stump meant that something was living under it. Possibly a ground hog, but I didn’t see a single paw print.

This old maple tree was covered on its sunny side by whitewash lichen (Phlyctis argena.) This is a tough, crusty lichen that is fairly common on hardwood tree bark. They can cover quite a large area and make the tree look as if it has been painted, hence the common name. They can be greenish white, silvery, or bright white.

As time passed barbed wire was often added to stone walls to keep animals in or out. Stone walls were usually too low to be effective and cows and other farm animals often jumped right over them, so their height was increased by adding wire or other materials. You had to pay a fine if your animals escaped and were caught roaming free. They were brought to the town pound and the owner had to pay to get them back. This wire grew out of the very center of a pine tree, so it has been here for quite a while. Running their saw into steel wire is one of a wood cutter’s worst nightmares come true but many things have been found inside trees, from axe heads to gravestones to even bicycles.

Every time I see rusty old barbed wire stapled to a tree I think about a book I read by a man who lived in a cabin in the Massachusetts woods. He said that one of his favorite things to do was run through the woods at night. He wouldn’t want to do that here. I wouldn’t even run through these woods in broad daylight because much of what is now forest was once pasture, and there is a lot of barbed wire out there.

Peppered rock shield lichen (Xanthoparmelia conspersa) likes to grow on stone in full sun and I find a lot of them on stone walls. They’re a good introduction to lichen study because their brown apothecia, where their spores are produced, are large and easy to see without aid.

Scattered rock posy lichens (Rhizoplaca subdiscrepans) on the other hand, are quite small and difficult to see without magnification, but it’s worth looking for them because they almost always have their bright orange apothecia showing. They like to grow on stone, especially granite, in full sun. They don’t seem to change their color when they dry out like many other lichens do.

Sometimes it isn’t what is on the stone that interests me, it’s the stone itself. I’m not sure if this pattern was on the stone or part of it but it was very interesting. Also interesting was how it had absolutely nothing growing on it when all of the stones around it had mosses and lichens growing on them.

I never knew my grandfather but I do know that he made his living as the town blacksmith in Westmoreland, New Hampshire, and this old horse hitching ring brought thoughts of him to mind. If he was lucky a blacksmith might make a dollar a day but very little cash changed hands in colonial America so he most likely would have been paid in food, charcoal for the forge, lumber, or something else he needed. In the early 1800s blacksmiths charged anywhere from 2 cents for an axe wedge to $5.50 for all of the ironwork on a new wagon. That would include springs, axles, brakes, and rims for the wheels. I have a photo of my grandfather working on a wagon wheel in his blacksmith shop. The wheel sits on top of a big wooden keg that he probably made the iron hoops for. I hope he was paid more than they were in colonial times.

Some of the stones in this old wall are not natural, meaning they were cut or quarried. There is a large granite outcrop just up the hill from this spot and stone was taken from it using star drills and sledge hammers, I would imagine. The marks of the old hand drills are still easily seen on some of the stones. It’s unusual to see both natural and cut stones together in a wall; usually they’re made of one or the other but the farmer could have been trying to increase the height of his walls.

Some of the quarried granite was used for fence posts. Four posts were put in around certain family plots in the cemetery and chain hooks were added by drilling a hole into the top of each post and hammering a hook into the hole.  I’m not sure if friction alone held the hooks in the holes or if cement was added to hold them, but after over 200 years they are still solid and immovable.

Once chain was added the family plot was enclosed but still visible to anyone trying to find it. This chain looks like it was hand wrought.

Blacksmiths don’t cast iron; they soften it by heating it in a forge and then shaping it with a hammer, and I love how you can see all the hammer blows on this chain hook. I also love how the smith fashioned something as simple as a chain hook into what looks like a dragon’s tail. He didn’t have to do this; it was extra work that he probably wasn’t paid for, but he was good and would have wanted people to know his work. If I needed ironwork done and I saw this hook and the ones in the previous photos I would have chosen the smith who made this one. It’s a beautiful thing which, if I owned it, would be considered a work of art.

Sometimes these posts wander in unplanned directions and almost write themselves, and this is one of those; l felt as if I were just along for the ride instead of the one doing the writing. It began in the old cemetery and I just tagged along with the camera while the story wrote itself in my mind, so I hope you won’t mind that there is a little more history than botany in this one. Though I expected the post to be full of mosses and lichens for me the history I found was a refreshing diversion while I wait for spring flowers to appear, and thoughts of my hammer wielding grandfather ran all through the day. I wonder if he ever imagined that one of his grandsons would grow up to be a stone wall builder.

Stones are all about time—time to find them, to move them, to place them, and time, occasionally, to chisel and shape them. And above all, time to see them, experience them, and fall under their spell. ~Charles McRaven

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Lichens

Unfortunately there are people who think that once the leaves have fallen there is nothing left to see outside until spring, but they couldn’t be more wrong. Lichens for instance, are there year round and unless you live in a place with poor air quality they are everywhere; on trees, on stones, on the ground, and even on buildings, roofs, windows, and sidewalks. They are like small jewels that have been sprinkled throughout nature and one of my favorites is the smoky eye boulder lichen (Porpidia albocaerulescens) shown above. The blue dots are called apothecia and are where its spores are produced. They are blue because of the way the light reflects off the thin wax coating that they are covered by. In this case the body of the lichen, called the thallus, is a brownish gold color. The thallus can also be gray and the apothecia gray to black. One of the things that can make lichen identification difficult is the ability of some lichens to change color in different light, and this is one that does. It can look very different just a few feet away.

The apothecia on this star rosette lichen (Physcia stellaris), is a good example of how colors can change, even on the same lichen. This lichen has dark brown apothecia that are often pruinose. Pruinose refers to the white, waxy, powdery coating like that found on the smoky eye boulder lichen in the previous photo. You’ve no doubt seen examples of this waxy “bloom” on blueberries and plums. I’ve noticed by watching lichens that have pruinose apothecia that the coating can reflect light in different ways, sometimes appearing gray and at other times more blue, and sometimes even black. The apothecia on this lichen show a range of colors, from brown to light blue. The way the sunlight strikes it has a lot to do with its colors.

I used my magic gravity defying penny so we could get an even better idea of the scale of some of these lichens. For those of you not familiar with the size of a penny, they are 3/4 of an inch (19.05mm) in diameter. The powdery sunburst lichen just above it is almost the same size. The lichens below, right and left of the penny are star rosette lichens like the one we just saw in the previous photo. That penny could use a good cleaning.

This is the powdery sunburst lichen (Xanthomendoza ulophyllodes) we saw above the dirty penny in the previous photo. This foliose lichen is easy to see even when it’s small, because of its bright orange yellow color. This lichen really likes moisture and is often found growing near channels that carry water on stone or bark. A foliose lichen has a lobed, leafy look.

British soldier lichens (Cladonia cristatella) like to grow on damp wood like rotted stumps and logs, but I’ve found them on buildings, fence posts, and built up forest litter on boulders. At this time of year I don’t pass too many mossy old tree stumps without having a glance for British soldiers. Their bright red apothecia make them easy to see, even if you’re colorblind.

Pink earth lichen (Dibaeis baeomyces) closely resembles bubblegum lichen (Icmadophila ericetorum.) One of the differences between the two is the length of the stalks that the plump pink apothecia sit on. They are longer on bubblegum lichens than they are on pink earth lichens. Both are very beautiful things that are rarely seen in this area. The whitish thallus, or body of the lichen, grows on soil; usually on dry acidic soil near blueberry and sweet fern plants. It can sometimes have a bluish cast as well.

I find pebbled pixie cup lichens ((Cladonia pyxidata)) growing on soil or rotting stumps and logs, and occasionally on stone. Pixie cups look like tiny golf tees or trumpets. They are squamulose lichens, and the golf tee shapes arise from leafy growths called squamules. A squamule is a lobe of the body of the lichen (thallus,) and  squamulose lichens have small, leafy lobes.

Though pixie cup lichens are squamulose they have fruticose fruiting structures called podetia. The parts that look like tiny golf tees are called podetia. “Podetia” describes a stalk like growth which bears the apothecia, or fruiting bodies. This example shows some almost microscopic dots around the rim, which are its apothecia. Finally, frucitose means a lichen has a bushy, vertical growth. Since this example has squamules even growing inside the tiny cups it must be a pebbled pixie cup lichen.

A single raindrop was caught in the cup of this pixie cup and it illustrates how the cups are meant to do exactly this; they are splash cups and when a raindrop lands in them the water splashes the spores out and away from the lichen to hopefully colonize new ground. Pixie Cups and other Cladonia species like reindeer lichen contain didymic acid, and they were once used by herbalists to treat tuberculosis.

Dog lichens will grow on soil, rotting wood, or stone as this one was. The example pictured is I believe, a membranous dog lichen (Peltigera membranacea.) Dog lichens are associated with mossy areas because the mosses provide the moisture that they need. It is known as membranous lichen because it is thin and pliable. It is also a foliose lichen because it is lobed, or leaf like. The upper part of the body (Thallus) is undulating or veined. This lichen is large and easy to see. It is also probably quite old.

One theory behind the name “dog lichen” says that the name refers to the large, lobed body of the lichen looking like dog ears. It sounds plausible, but so do the other three theories I’ve heard. One says the fang like rhizines look like dog’s teeth, another says the entire lichen body looks like a dog, and yet another says that the apothecia, or fruiting bodies, look like dog ears. I’ve never seen this one produce fruiting bodies so I can’t verify that last one and it doesn’t really look like a dog to me, so I can’t verify the second one either.

What sounds most plausible to me about the origin of the name “dog lichen” are the white “roots” on the white underside of the lichen body. They are fang like and called rhizines. On some lichens they can be quite bushy, but on Peltigera membranacea they are narrow and thin. They are one of the identifying characteristics of this lichen along with its thin, flexible, undulating thallus.

Common goldspeck lichens (Candelariella vitellina) are uncommonly beautiful. Look for this bright yellow crustose lichen on stone. It’s a very artistic lichen and I like the patterns that it makes. I see it on gravestones quite often.

It shouldn’t come as a great surprise that, at high magnification, the body of the common goldspeck lichen looks like it’s made up of tiny golden specks. The book Lichens of North America describe the body of this lichen as “little cushions of flattened granules.” This lichen is sometimes sterile, with no fruiting bodies present, as this one appeared to be.

Scattered rock posy lichen (Rhizoplaca subdiscrepans) is both beautiful and unusual with its brain like body and orange fruiting bodies. This one was growing on stone in full sun. There was a time when I knew of only one example but now I see them everywhere, even on mountain tops. This example was about as big as a penny.

If you spend time walking along old stone walls eventually you’ll see a stone with a splash of bright orange on it and it will probably be the sidewalk firedot lichen (Caloplaca feracissima,) so called because it is a lime lover and grows on concrete sidewalks, which have lime in them. When you see it in a stone wall it’s a fair bet that the stone it grows on has limestone in it too. This stone is almost completely covered by it.

A closer look at this example of the sidewalk firedot lichen showed it was made up of mostly irregularly shaped fruiting bodies, so it was making plenty of spores. It was raining at the time so it was also very wet. Lichens are at their best when they are wet because that’s when they’ll show their true colors and size, so that’s when serious lichen hunters look for them. A misty or drizzly day is perfect.

One thing you learn quickly when you decide to study lichens is that your pockets will be as full of unknowns as they are knowns, and this lichen shows why. You’ll see why in the next photo, so try to remember how it looks here.

Not only do lichens change color but shape as well. It’s hard to believe that this is the same kind of lichen that we saw in the previous photo but it is, and it is the apothecia in full “bloom” that makes it look so different from photo to photo. This is why it has taken me as long as three years to identify some lichens. I’m not completely comfortable with my identification of this one but I think it might be the brown eyed rim lichen (Lecanora epibyron.) Brown eyed rim lichen is described as a “white to very pale brown crustose lichen with many red-brown apothecia with a white margin.” It seems to fit, but if you know this lichen and know that my identification is wrong I hope you’ll let me know.  I found it growing on ash tree bark.

As its name implies maple dust lichen (Lecanora thysanophora) grows on the bark of maple trees, but I’ve also seen it on beech, oak, and basswood. One of the easiest ways to identify this lichen is to look for the white fringe around its perimeter. This is one of those lichens that I never saw until I stumbled across it one day, and now I see it everywhere. This beautiful example was about 3/4 of an inch in diameter, or about the size of a penny.

Some lichens are very easy to identify because there aren’t many others that look like them, and the toadskin lichen is one of those. Toadskin lichens are another one that shows color changes. When wet it is pliable and pea green and when dry it becomes crisp and ash gray. This example hadn’t completely dried out but it was well on its way. Toadskin lichens get their common name from their many “warts.” They attach themselves to stone at a single point that looks like a belly button, and that makes them an umbilicate lichen. This toadskin is very special, because it is the only one I’ve ever seen that wasn’t on a hill or mountain top. It grows on a boulder at the very water’s edge of a lake and now I know, if the day comes when I can no longer climb, I’ll still be able to see these beautiful little things.

I hope you’ve enjoyed seeing a few of the lichens I know and I hope you’ll look for them in your area. Just look closely anywhere you happen to be; they’ll be there too.

Oh what a strange nature is knowledge! It clings to the mind when it has once seized on it like a lichen on a rock. ~Mary Shelly

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Things I’ve Seen

I visited the otter pond recently, trying to figure out how he would come and go. This small stream feeds into the pond but it’s too shallow and narrow for an otter to swim in. It had some beautiful patterns in its ice though.

The reason I wondered about the otter is because its pond is completely frozen over with no holes like there were the last time I saw it in December. Where do otters go when this happens, I wonder?

All of the thawing and re-freezing has left the ice as smooth as glass, but the warm weather has made it too thin to skate on. The two dark spots show little to no thickness and there were thin ice signs where people skate. I’m sure there are a few dozen frustrated skaters it town because of it.

I saw some burdocks and remembered how Swiss engineer George de Mestral got the idea for Velcro from the sticky burrs lodged in his dog’s coat. I wondered why I didn’t think of such things.

This is where the hook part of the “hook and loop” Velcro fasteners came from. I’ve never seen it happen but I’ve heard that small birds can get caught in burdocks and then can’t escape. That could be why there were no seeds missing from these examples; maybe the birds have learned to stay away. According to John Josselyn, a visitor from England in 1672, the burdock came to this country as burrs tangled in cow’s tails, but if that is true then how did Native Americans know the plant so well? They used the entire plant as food or medicine and made a candy-like treat from burdock roots by slicing them and boiling them in maple syrup. They stored much of it for winter.

Birds aren’t staying away from coneflower seeds. I always let coneflowers (Echinacea purpurea) go to seed. Goldfinches, cardinal, blue jays and other birds love to eat them. I’ve never seen a bird on them but the seeds disappear and there is often a pair of blue jays in the yard.  Many butterflies and bees also love its flowers, so if you’re looking to attract the birds and bees, this is one plant that will do it. The Echinacea part of the scientific name comes from the Greek word echinos, which means hedgehog, and refers to the spiny seed head.

An old pine stump was red with British soldier lichens (Cladonia cristatella.) This lichen also grows on bark or soil and is often seen where people live because it is extremely tolerant of pollution. Because of that and its bright red color it is said to be the best known lichen in the eastern United States. I’ve even seen it growing on buildings.

The spore bearing apothecia of the British Soldier is very red with a matte rather than shiny surface. The biggest among this grouping could have easily hidden under a pea.

If you spend time walking along stone walls eventually you’ll see a stone with a splash of bright orange on it. This is the sidewalk firedot lichen (Caloplaca feracissima,) so called because it is a lime lover and grows on concrete sidewalks, which have lime in them. When you see it in a stone wall it’s a fair bet that the stone it grows on has limestone in it.

A closer look at this example of the sidewalk firedot lichen showed it was made up of mostly irregularly shaped fruiting bodies, so it was making plenty of spores. I think this is the first time I’ve seen it do so.

I had to visit my old friend the scattered rock posy lichen (Rhizoplaca subdiscrepans) that I’ve been watching grow for several years now. It has gone from penny to quarter size (0.75-0.95 in) and is both beautiful and unusual with its brain like body (Thallus) and orange fruiting discs (Apothecia.) I always find them growing on stone in full sun. This is a lichen that never seems to stop producing spores; its orange pad like apothecia are always there.

If you’re stuck in the winter doldrums and feel the need for some color, just find a blueberry bush; everything about them is red, except the berries. Part of the reason the earliest English settlers survived New England winters in Plymouth was because the Native Americans of the Wampanoag tribe showed them how to dry blueberries for winter use. Natives used the dried berries in soups and stews and as a rub for meat. They also made tea from the dried leaves. More than 35 species of blueberries are native to the U.S.

Amber jelly fungi (Exidia recisa) have started to appear on downed trees and limbs. You can’t tell from this photo because these examples were frozen solid but this fungus has a shiny side and a matte finish side. The spores are produced on the shiny side and if I understand what I’ve read correctly, this is true of most jelly fungi. This one has the color of jellied cranberry sauce. Jelly fungi can absorb up to 60 times their weight in water, so if a weakened branch is covered with them as this oak limb was, it doesn’t take much of a wind to bring the heavily weighted branch and the jelly fungi to the ground. Jelly fungi are a signal that the tree’s health isn’t good.

Indian pipe (Monotropa uniflora) seed pods look like beautiful carved wooden flowers that have been stuck into the snow. Most have split open by now into 5 separate parts to release tens of thousands of seeds to the wind. Each individual seed is only ten cells thick. Indian pipes are parasitic on certain fungi, which in turn are often parasitic on the roots of trees so in a roundabout way they get their food from trees.

Tinder polypores (Fomes fomentarius), also called horse hoof fungus, grew on a fallen log, but didn’t grow on the tree while it was standing. I know this because their spore bearing surfaces pointed towards the ground. If they had grown before the tree fell then their spore bearing surfaces would appear perpendicular rather than parallel to the ground. This bracket fungus produces spores at all times of year but through spring and summer studies have shown that as many as 800 million can be produced in a single hour. The fungus is also known for its ability to stop bleeding and was recommended for that purpose by none other than the father of medicine himself, Hippocrates (460 – 370 BCE).

I’ve searched and searched for the answer to why some trees twist when they grow and the short answer seems to be; nobody really knows. What is known is that the wood is often weaker and boards cut from spiral grained trees often twist as they dry, yet while the tree is standing it is more limber than a straight grained tree and is better able to withstand high winds. Scientists have also found that spiral growth can be left or right handed and both can sometimes appear on the same tree. Though spiral growth appears in the trunk, limbs and roots of some trees you often can’t see it until the bark comes off.

It’s easy to believe that a fallen tree is just an old dead thing that is slowly rotting away but as the icicles on this example show, there is life in it yet.

It’s always a pleasure to see the beautiful blue of first year black raspberry canes in winter. The color is caused by a powdery wax which can protect the plant from sunburn, prevent moisture loss, or help shed excess water. In botanical terms, a plant part that looks like this is said to be glaucous, which describes the whitish blue color.

The blue of this blue jay feather rivaled that of the black raspberry cane. I don’t see many blue feathers so I was happy to see this one.

I was even happier when I looked a little closer. Seeing it up close revealed many things about blue jay feathers that I didn’t know. Chief among them was how very beautiful they are.

To look at a thing is very different from seeing a thing.  One does not see anything until one sees its beauty. ~ Oscar Wilde

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