Searching for Signs of Spring

Last weekend (before our latest snowstorm) I decided to look for signs of spring. What follows is some of what I found.

 

I started my search in a low, swampy area where hundreds of skunk cabbage (Symplocarpus foetidus) plants grow. The plant smells just like its name suggests and I could smell them as I tiptoed through the snow, trying not to step on them.

 

I saw signs of life. Skunk cabbages are one of the earliest spring plants, and through a process called thermogenesis are able to generate temperatures far higher than the surrounding air. You can often see evidence of skunk cabbage having melted its way through several inches of solid ice.

 

The maroon thing with yellow-green splotches that looks like a tongue in the lower right corner is this year’s skunk cabbage flower (spathe), just starting to poke up out of the soil.

  

Script lichen (Graphis scripta) doesn’t have anything to do with spring except to remind me that soon it will be much harder to find lichens because of foliage.  Script lichen grows on tree bark and is seems to be quite rare here. I’ve only seen two examples in my lifetime, but a lot of that could be because I forget to look for them.  The dark lines that look like some type of strange cuneiform writing are the apothecia, or fruiting bodies of this crustose lichen. These were much larger on this example than on the other one that I found.

  

The terminal buds of shagbark hickory (Carya ovate) are quite large and can fool you into thinking that they are swelling because of spring sap flow but no, they are this way all winter. We have to have several sunny days above freezing to trigger sap flow, so it’ll be awhile yet before buds really start to swell.

I loved all the movement and texture in these American hazelnut seed pods. Hazelnuts (Corylus Americana) are usually snapped up quickly by bears, squirrels and other animals but in this spot I could have collected pockets full of them. It makes me wonder why the animals aren’t eating them.

 

The tasty hazelnuts are also called filberts. Each one is about as big in diameter as an M&M candy. It’s strange to see them this late in the year.

 

Native evergreen marginal wood fern (Dryopteris marginalis) gets its common name from the way its spore cases or fruit dots (sori) grow on the margins of the leaflets (pinnules). These ferns grow new sori on fertile fronds each spring and release their spores in July and August. The sori are no bigger than a match head.

On marginal wood fern the sporangia inside the spore cases are covered by a membranous cover called an indusium or fruit cover. When the sporangia are ripe they push this cover off so the tiny, dust like spores can be released.  This only happens on a dry day when there is a dry breeze so the spores might be carried as far from the parent plant as possible. Some ferns, like polypody (Polypodium vulgare), lack indusia and have naked spore cases.  The fiddleheads of this fern are covered with golden brown scales and are among the first to appear in spring.

 

This example of a tinder polypore (Fomes fomentarius), also called horse hoof fungus, looked ancient but probably isn’t that old. 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).

If you see a tree with what looks like fine, lacy, brown or purplish spots all over its trunk a closer look might show the spots to be Frullania eboracensis liverworts. This is the only liverwort in this region that can stand a dry environment. It is considered a northern species and is quite common here. I find it on maples and oaks. Though the one in the photo is dime sized they can get to the size of a grapefruit.

Frullania eboracensis liverworts are considered leafy liverworts. The above photo shows how the almost microscopic, zipper like, zig zagging leaves overlap. Not seen are the sac like lobes on their undersides. The leaves radiate outward from a central point and become very dark in winter, lightening as the air temperature warms. Quite a few lighter colored ones can be seen here, so maybe they feel spring in the air.

Last time I visited this willow it had one catkin showing, but on this day there were many. I haven’t been able to figure out which willow it is yet, but its catkins are quite small. Male catkins appear much earlier than female catkins, so there’s a good chance that these are male.

Spring might seem like it’s far off but if you go by nature rather than the calendar, you can see it happening right now.

Even in the winter, in the midst of the storm, the sun is still there.  Somewhere above the clouds, it still shines and warms and pulls at the life buried deep inside the brown branches and frozen earth. ~Gloria Gaither

Thanks for stopping in.