Our buds of winter

They’ve been there all winter, you know, those buds on the trees. Perhaps we will notice them more now as temperatures moderate and we get outside to look for signs of winter giving up. When we see the buds, we can appreciate that they’ve survived below-zero days and nights to give us hope for spring and all its greenness.

Buds form in late summer at the base of leaf stems. As soon as colored leaves fall in autumn, the new buds enveloping next spring’s new leaves, flowers and stems are visible. But we may be too busy raking leaves to notice the infancy of next year’s crop.

It’s more fun to take a look now as we search for signs of approaching spring. Against a blue sky of February, the buds of birch, maple, box elder and lilac trees in the back yard are easily revealed. So when we say trees are “budding” in spring, what we actually mean is that the buds that have been there all winter are “bursting.” Yes, in spring, the buds will be warmed and swell to a point that they burst from the outer scale that protected them in their dormant state of winter.

I snipped off a twig from the birch tree and slit open the scale with a sharp knife to reveal a tiny green bud—a leaf—about a quarter-inch long. Imagine, these little green leaves wrapped up tight and protected from the days and nights of below-zero temperatures. These miniscule oblong buds, now tucked inside the hard cover of the bud scale, will emerge as tiny leaves and grow and grow and grow into our summer shade and fall colors.

So take a look this winter at the tree buds and wonder at the precision of nature in protecting what will be the beauty of trees through spring, summer and fall. These buds over the next couple of months will be teased to burst open with spring fever, much the same as every one of us. But we will all have to wait until the time is right.

Leaves by the number

Warning: Rough estimates ahead.

Every summer I’m amazed at the height, width and fullness of our large birch tree in the back yard after its spring rebirth from winter’s bareness. It is the biggest birch I know of, though I don’t go on searches for big birch trees.

As I stare at this old, mature tree, which hides all kinds of birds and squirrel nests and has some dead spots for the pileated woodpeckers, I always ask the question with the impossible answer: How many leaves?

I finally came up with a formula to estimate the number of leaves on the mighty birch with its three trunks from which several hefty horizontal branches spread. The formula may be flawed, but I go with it.

I stepped off the widths, north to south and east to west, and they were fairly even at about 40 feet. Knowing the tallest birches in Wisconsin are 65 to 70 feet, I conservatively topped my tree out at 60 feet.

Those measurements gave me 96,000 cubic feet of space. Accounting for open spaces in the tree, I halved that to come up with 48,000 cubic feet of leaf area. Then I counted 55 leaves in one cubic foot. Multiplying 48,000 by 55 gave me about 2.6 million leaves.

Am I even close? I did some research of other folks with the same leaf question. I found one estimate of 2 million leaves on a big oak tree, so that’s close to my number. However, another leaf counter came up with 200,000 leaves on a large mature tree, so that’s not close.

One thing I am sure of is how much I, along with the birds and squirrels, enjoy this big birch, no matter how many leaves.