Buds

You’ve seen a lot of buds on this blog but you haven’t seen many buds from a sweet gum tree (Liquidambar styraciflua). Massachusetts is the northern limit of their natural range but luckily I know a spot at the local college where two or three trees can grow thanks to the radiant heating they get from a massive wall of brick that they grow beside. As buds go these are big; this one was maybe the size of a blueberry, and may be green, red or orange, from what I’ve read. Buds with many scales that overlap like shingles are called imbricate buds. A gummy resin often fills the spaces between the scales and makes the bud waterproof on northern trees, but I’m not sure how the sweetgum buds waterproof themselves. I can see tiny hairs at the edge of the scales, so maybe that has something to do with it.

The identification of the sweetgum trees came easily because of their strange seed pods. I’ve read that Native Americans used the hardened resin from these trees for chewing gum. The resin was also used in a tea to calm the nerves and, when powdered and mixed with shavings from the tree, was used as incense by the Maya. The resin is said to look like liquid amber, and that’s where the first part of the scientific name, Liquidambar, comes from. I’d love to see it but I doubt the local college would let me tap their trees.

Bud scales are modified leaves that cover and protect the bud through winter. Some buds can have several, some have two, some have just one scale called a cap, and some buds are naked, with none at all. The lilac bud (Syringa vulgaris) in the above photo is another good example of an imbricate bud. I was surprised by the lack of gummy resin on these buds. I hope the flower or leaf buds inside aren’t harmed because of it.

The hairy, two part valvate bud scales of the Cornellian cherry are always open just enough to allow a peek inside. The gap between the bud scales will become more yellow as the season progresses and finally clusters of tiny star like yellow flowers will burst from the bud. These buds are small, no bigger than a pea. Cornelian cherry is an ornamental flowering shrub related to dogwoods. It blooms in early spring (usually March).

Magnolia flower buds in botanical terms are “densely pubescent, single-scaled, terminal flower buds.” The hairy single scale is called a cap and it will fall off only when the bud inside has swollen to the point of blossoming. Just as the plant flowers the ground under it will be littered with these hairy caps for a short time.

Many plants protect their buds with hairs, like the staghorn sumac (Rhus typhina) shown above. Plants that protect their buds in this way have naked buds, and the hairs take the place of bud scales.  

Red oak (Quercus rubra) buds usually appear in a cluster and are conical and reddish brown. I like the chevron like pattern that the bud scales make. Red oak is one of our most common trees in New England but in the past many thousands were lost to gypsy moth infestations. It is an important source of lumber, flooring and fire wood. The USDA says that red oaks can live to be 500 years old.

Do you think of buds when you see a catkin? A catkin is really just a long string of tiny flowers arranged in a spiral, surrounding a central stalk. Though the bud scales on many of the male alder catkins (Alnus incana) are usually a deep winter purple, this year they seem to be more red. That doesn’t matter because soon they will start to lengthen and become more pliable before turning shades of pink, orange, red and brown. Once that happens they will start to open.

There is no mistaking what you’re seeing when male alder catkins start to open. The bud scales are on short stalks, and when they open they reveal the tiny green yellow flowers they have protected all winter long. Bushes full of them are easily one of the most beautiful spring sights.

Each bud scale has three male flowers beneath, each with a lobed calyx cup and three to five stamens with anthers covered in yellow pollen. The flower parts are clearly visible in this photo but even though it is heavily cropped they are still tiny. The entire catkin is only about 2 1/2 inches long.

The male flowers of gray birch (Betula populifolia) also appear in catkin form but instead of hanging down they often point straight up, as this one was doing.

The female flowers of gray birch turn into big, drooping clusters of seeds, which are also called catkins. You can see the size, habit and shape difference between the male and female catkins if you compare the large female catkins to the much smaller male one seen in the upper right corner of this photo.

Highbush blueberry (Vaccinium corymbosum) buds, like lilac and others, are imbricate buds with overlapping bud scales. It’s interesting that almost everything about the blueberry is red except for its berry. The new twigs are red, the bud scales are red, and the fall foliage is very red. Though small the buds are beautiful, and one of my favorites.

The chubby little green and purple buds of red elderberry (Sambucus racemosa) are also one of my favorites, but I don’t see them very often. Since they have more than two bud scales they are imbricate buds.

Some of the smallest buds I know belong to hawthorns (Crataegus) and the cherry red hawthorn bud in the above photo could easily hide behind a pea. There are over 220 species of hawthorn in North America, with at least one native to every state and Canadian province. In New Hampshire we have 17 species, so the chances of my identifying this example are slim to none. I know the tree in the photo well so I know that its blossoms will be white. Hawthorn berries are called haws and are said to have medicinal value. Native Americans mixed the dried haws and other fruits with dried venison and fat to make pemmican.  The dried flowers, leaves, and haws can be used to make a tea to soothe sore throats, and hawthorn also shows promise for treating heart disease.

Big, black and pointed mountain ash buds (Sorbus americana) often look like they have a single cap like bud scale but they actually have several overlapping scales which are quite sticky. You have to look closely at buds to see what is really going on, so it helps to have a loupe or a macro lens.

Norway maple (Acer platanoides) is supposed to be a very invasive species but they’ve been used for years as landscape trees so the genie has been let out of the bottle and now there is no stopping them. The Norway maple’s terminal bud and stem are larger than the sugar maple’s, and its bud scales are fewer and colored a pleasing maroon. Sugar maples have twice as many bud scales and they are brown. Norway maple terminal buds are also rounded while those of sugar maple are sharply pointed. Norway maple is native to eastern and central Europe and western Asia, from France east to Russia, north to southern Scandinavia and southeast to northern Iran.

Box elder (Acer negundo) is another member of the maple family and its buds and young twigs are often a beautiful blue or purple color due to their being pruinose. Pruinose means a surface is covered in white, powdery, waxy granules that reflect light in ways that often make the surface they are on appear blue. Certain grapes, plums, and blueberries are pruinose fruits. Certain lichens like the beautiful smoky eye boulder lichen have fruiting bodies (Apothecia) that are pruinose.

Terminal buds appear on the end or terminus of a branch and nothing illustrates that better than the sugar maple (Acer saccharum). The larger, pointed, very scaly bud is flanked by smaller lateral buds on either side. The lateral buds are usually smaller than the terminal bud. Sugar maple twigs and buds are brown rather than red like silver or red maples. I know that the sap is running so these buds will be swelling up and getting bigger before too long. In 2019 New Hampshire produced a below average 148,000 gallons of maple syrup but the season was 5 days shorter shorter due to cold weather. The average price per gallon in 2019 was $31.00. The record price per gallon was $40.70 in 2008.

Red maple flower buds (Acer rubrum) are small and round or oval with short stalks and 4 pairs of bud scales. The bud scales are often purple and / or tomato red and they have a fine fringe of pale hairs on their margins. They are one of the first to open in spring so I watch them closely beginning in March.

I realize that these bud posts probably don’t excite everyone like they do me but I hope people will look beyond all the imbricate, valvate and other fancy scientific labels and simply see the beauty. If the beauty that you see leads you to wonder and mystery, then you can start trying to find out more about what you’ve seen. Some think that beauty comes in the form of snow capped peaks or far off landscapes and indeed it does, but beauty also comes in the form of tiny tree buds. In fact beauty is all around you and the more you look for it the more of it you’ll see. Here’s hoping you’ll see plenty.

If you are open to being taught by nature, go listen to the trees. ~Kenneth Meadows

Thanks for coming by.

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More Signs of Spring (and a Few Other Things)

There is nothing special about this photo of a swamp, other than to mark the place where I heard the first red winged blackbird of this year. I haven’t seen any but I’ve heard them and that’s another sign of spring.

I hope the red winged blackbirds know what they’re doing because this frozen pond is right across the road from the thawed swamp in the previous photo. Our nighttime temperatures are still falling below freezing but I hear the birds each morning.

Half Moon Pond in Hancock certainly didn’t look very spring like after one of our many recent nor’easters. Before this cold came in March it looked like the ice would be gone in less than another week.

The wind blows strongly off Half Moon Pond almost all of the time, and this lake sedge (Carex lacustris) shows the direction. This sedge grows in large colonies near lakes, ponds, and wetlands and is native to Canada and the northern U.S. It is a pleasant shade of green in summer and can sometimes be the dominant plant along shorelines and in swamps. Waterfowl and songbirds eat its seeds.

When I saw a mullein seedling (Verbascum thapsus) I realized that I had never seen another one, most likely because I wasn’t paying attention. It was every bit as wooly as its adult counterparts and ready to start photosynthesizing. Mullein is a biennial that flowers and dies in its second year. This one was about the size of a baseball, or just over 9 inches.

I went to see my old friends the striped wintergreens (Chimaphila maculata) to see how they came through the winter and I was happy to see that they looked good and healthy. This is a plant I don’t see that often and I only know of three or four small colonies. Hopefully they will bloom and set seed in mid-July.

Trailing arbutus (Epigaea repens) grows near the striped wintergreens and also came through the winter looking well. This plant always reminds me of my grandmother because it was one of her favorites. The plant is also called mayflower and was once nearly collected into oblivion so the very fragrant blossoms could be used in nosegays, but it is now protected in many states. It relies heavily on a relationship with certain fungi mycelium in the soil and it absolutely refuses to grow anywhere that the mycelium isn’t present. Native Americans used to use the plant medicinally to break up kidney stones. It was so valuable to them that it was thought to have divine origins.

The basal leaves of hawkweed (and many other plants) often turn deep purple in winter. Many trees and other plants conserve a lot of energy if they don’t have to make  chlorophyll so in the fall many stop making it. When that happens other colors which were there all along start to show. Carotenoids make leaves orange and yellow and anthocyanins make them red, pink or purple. Anthocyanins can also protect leaves from getting sunburned in winter if they are evergreen.

Beaked willow gall is caused by a tiny midge laying its egg in a willow bud. The reddish galls usually form at branch tips in the fall and will house the fly larva all winter. It will eat the tissue in the gall until spring, when it will pupate and an adult midge will emerge. Winter is a great time to look for galls, which are often hidden behind leaves at other times of year.

I’m always amazed by how much red there is in highbush blueberry (Vaccinium corymbosum) and nothing shows it better than the witch’s brooms that are so common on these shrubs. On blueberries witch’s brooms are cause by a fungus that deforms branches or roots and causes a dense mass of shoots to grow from a single point. In my experience they don’t really harm the plant and can even be quite pretty with snow on them.

An old trick that gardeners sometimes use when they want to grow plants that aren’t hardy in their area is to plant the sensitive plats near a stone or brick wall. The mass of masonry absorbs the warmth of the sun during the day and releases it slowly at night, protecting the plants from frost damage. Sweet gum trees grow near such a sunlit wall at the local college and the above photo is of one of their seed pods (Liquidambar styraciflua.) Seeing these pods here seems very strange because sweet gum is thought of as a “southern tree,” and Massachusetts is the northern most point that it grows naturally. I never saw the seed pods as a boy but I wish I had because they’re interesting and hold their shape well when dried. They would have made a great addition to my collection of natural oddities.

The base of this eastern hemlock tree (Tsuga canadensis) was covered by what I think must be yellow green algae (Pleurococcus vulgaris.) These algae grow on the shaded sides of tree trunks, on soil, stones and even on walls. Their closest relatives are said to grow in lakes and rivers, but these species can withstand some dryness. Fossil evidence shows that algae have existed for at least 540 million years.

A saw another hemlock that had a deep crack in its bark that ran straight and true from the ground to about 15 feet up. At first I thought it must be a frost crack but I’ve never seen one so long, so I’m guessing it must have been a lightning strike. Since it was an older wound there were no pieces of bark that might have been blown off lying around. I came upon a tree once that had been recently struck by lightning and there were strips of bark all over the ground. No matter how the crack was made I’m sure it made quite a loud noise when it happened.  On cold winter nights you can sometimes hear stressed trees cracking in the forest. It is sudden and sounds like a rifle shot.

The bud scales on many of the male alder catkins have gone from their deep winter purple to shades of pink, orange, red and brown. Soon the bud scales will open to reveal the yellow green flowers that will release the pollen to the wind. They become very beautiful at this time of year and sometimes when the light is right it looks like someone has strung ropes of multicolored jewels on all the bushes.

Boxwood (Buxus) is called man’s oldest garden ornamental because it has been used for hedges and specimen plantings for centuries. The early settlers thought so highly of it they brought it with them in the mid-1600s. The first plants were brought over from Amsterdam and were planted in about 1653 on Long Island in New York. There are about 90 species of boxwood and many make excellent hedges. These examples I found in a local park were budded. They’ll bloom In late April or early May but so will many other flowers, so these small but pretty ones will probably be overlooked.

The willows seem to be in a holding pattern. They’ve had their fuzzy gray catkins for two weeks now but there are no signs of the bright yellow flowers yet. Maybe I’ll see some later today.

I was flabbergasted when I saw the vernal witch hazels (Hamamelis vernalis) still blossoming. They’ve been through three nor’easters and zero degree cold but there are at least five bushes still full of flowers, so I’d say they were well worth what it cost to buy them. I wish you could smell them. I’ve heard their scent compared to laundry taken in fresh from the line but another description I just read says a hint of citrus-maybe lemon-is there as well. They seem a bit spicy to me but it’s a very pleasant scent that you can smell from quite a distance.

It’s always nice to see budded daffodils in spring. These were coming along well in spite of the zero degree cold we’ve had. They grow near the brick wall of a building and I think the heat radiating off the wall keeps them warm at night, just like the sweet gum trees we heard about earlier.

Not all the daffodils were lucky enough to have a brick wall, and this is what happened to many of those that didn’t. This is the second year in a row that this has happened to these bulbs and I’m not sure if they’ll make it now. A bulb needs leaves to photosynthesize and build up the strength it needs to blossom the following year. With their first spring leaves dying off for two years now I doubt they have much strength left. If they were mine I’d dig and replace them with later blossoming bulbs. They’re a bit overanxious I think.

Sometimes sunlight on moss is really all I need. I pity those who spend their lives chasing after riches, all the while missing the incredible richness all around them.

People don’t notice whether it’s winter or summer when they’re happy. ~Anton Chekhov

Thanks for stopping in.

 

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