Back to College

 

Recently a little birdie told me that some of the students in a certain biology class at a certain college were saying that it was “too cold” and that they “couldn’t walk in the snow.” And how were they supposed to find anything anyway when there’s “snow everywhere?”

Just for fun I decided to return to college myself just to see how valid these complaints were.

 

This was my chosen starting point on the campus of Keene State College. The great thing about nature study is it doesn’t matter which path you take. Nature will have something interesting to show you no matter where you go. With a willingness to participate and a little extra attentiveness you will learn things that you’ve never even imagined.

Oh-you will notice that the snow isn’t “everywhere.”

 

My first stop was the ivy covered walls of Parker Hall shown in the above photo. This photo is of Boston ivy (Parthenocissus tricuspidata), which lends its name to the “ivy league” schools. The odd thing about Boston ivy is its name, because it isn’t from Boston and it isn’t an ivy; it’s a member of the grape family and comes from China and Japan. This vine attaches to just about any vertical surface with tiny circular pads that form at the ends of its tendrils.  It secretes calcium carbonate and uses it to “glue” the pads to the surface it wants to climb. The glue can to hold up to 260 times its own weight.

If you are a biology student reading this blog then this photo should have you asking questions like why haven’t the birds eaten these crabapples?  You can see the hundreds of them in the background on the snow even though many birds, including robins and cedar waxwings, love crabapples. In a winter as harsh as this one you would think they would be gobbling them as fast as they could, so why aren’t they? Science has shown that birds will leave fruits that are lower in fat for last but are crabapples low in fat? The answers are simple; many crab apples are ornamental cultivars that birds just don’t like. Some other cultivars have fruit that birds will eat only after it has frozen and thawed several times.  If you want to attract fruit eating birds with crab apples (Malus) the choice of cultivar requires some research.

  

One of the ways to identify trees and shrubs in winter is by their buds. The size and placement of buds as well as the number of bud scales can all help with identification. Bud scales are modified leaves that cover and protect the bud through winter. Some buds can have several, some have two, some just one scale called a cap, and some buds have none at all. Buds that have several scales are called imbricate and have scales that overlap like shingles. The lilac buds in the above photo are good examples of imbricate buds.

 

Buds with just two (sometimes three) scales are called valvate. The scales meet but do not overlap. This Cornelian cherry bud is a great example of a valvate bud. In the spring when the plant begins to take up water through its roots the buds swell and the scales part to let the bud grow. Some bud scales are hairy and some covered with sticky resin that further protects the bud.

Cornelian cherry (Cornus mas) is an ornamental flowering shrub related to dogwoods. It blooms in early spring (in March) with clusters of blossoms that have small, bright yellow bracts.

  

Powdery goldspeck lichens ( Candelariella efflorescens) grow on tree bark of all kinds. The round, flattened, yellow patches are very small but grow in large colonies that make them easier to see.  Winter is the perfect time to look for lichens because they aren’t hidden by foliage. I saw plenty on this campus.

Lichens are great indicators of air quality because they refuse to grow where the air is polluted. There was a famous study done by schoolchildren in the United Kingdom in the 1960s. They produced a “mucky air map” that showed the absence of lichens from areas polluted by coal burning. Such a study (on a much smaller scale) done on a college campus might be a real eye opener. The lichens wouldn’t even have to be identified; simply recording their presence is enough. The absence of lichens is not a good thing.

 

The Tibetan cherry (Prunus serrula Tibetica) is also called the paper bark cherry because of the way its bark peels as it ages, much like a birch. It is used as an ornamental tree as much for its bark as for its flowers. The mahogany bark has very long, closely spaced lenticels that give it an unusual appearance. Lenticels are corky pores that allow gases like oxygen to reach the living cells of the bark. Without enough oxygen, bark can die.

I was surprised when I finally realized that these were sweet gum seed pods, because Massachusetts is the northernmost point that sweet gum grows naturally in the U.S. and, though it is native to the east coast, it is considered a “southern tree.” But, there is an old (often risky) trick that landscape designers will sometimes use if a client is determined to have a certain plant that isn’t hardy-they use masonry. If a plant that isn’t reliably hardy is planted near masonry it will often survive lower temperatures than it would otherwise because the masonry absorbs heat from the sun during the day and releases it slowly at night, keeping the plant warm enough to survive. There were several of these sweet gum trees near a massive wall of brick, and they were protected from wind by other buildings.

I’ve never heard of a dwarf sycamore tree but this is an empty sycamore seed head that I plucked from a tree with very mottled sycamore bark that stood no more than 7 feet tall. There are a large number of ornamental trees on this campus and I’m not sure how I would identify them all without occasionally asking the head gardener.

 

White rot fungus (Fomitiporia punctata) covered this fallen oak limb. There are many species of white rot fungi and they play a major part in wood decomposition. Scientists have discovered that they will also biodegrade environmental pollutants and certain chemical wastes. Researching that might be very interesting.

 

Amber jelly fungi (Exidia recisa) were on the same fallen oak limb, but frozen solid by the looks. This is the first time I’ve seen these growing on oak. I usually find them on alder. Some jelly fungi are also good at helping wood rot. This one fruits in late fall and winter and is a true winter fungus. I’ve always wondered why certain fungi only fruit in winter.

I was surprised to see this very invasive Japanese barberry (Berberis thunbergii ) growing as a hedge but as I think about it I shouldn’t have been. I’ve planted barberry hedges myself back when we didn’t realize how invasive it was.  I also saw burning bushes used in a hedge. Also called winged euonymus (Euonymus alatus), they are also very invasive and until recently were widely used. The final invasive that I found was oriental bittersweet (Celastrus orbiculatus). These were growing near a chain like fence-right where a bird might sit for a while after eating its berries.

Exploring their campus for invasive species would be a good project for a biology class and could be done at any time of year. The results might be surprising for those in charge of such things since, in this instance, this is a state college and the state has banned selling or importing these invasives.

  

The most satisfying thing I found on this campus was the little taste of spring provided by these inch high daffodil shoots. I was surprised since we had just seen a temperature of 7 below zero the night before.

So, if anyone reading this happens to be a student attending a certain biology class in a certain college, this post is for you. All of these photos and at least twice as many more were taken in less than an hour while meandering around the Keene State College campus and I didn’t once have to step in snow deeper than the soles of my hiking boots. It was cold but I dressed for it. That’s what we have to do to keep warm in a New England winter.  I hope this post has shown how easy it is to find things in nature with very little effort.

The scientist does not study nature because it is useful; he studies it because he delights in it, and he delights in it because it is beautiful.  ~Henri Poincaré

Thanks for coming by.