An online resource based on the award-winning nature guide

American Basswood

American Basswood Buds

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Bark, silhouettes and buds are the three keys to identifying trees in winter. Buds of different tree species are so distinctive they are an excellent identification tool. American Basswood, also known as American Linden,  (Tilia americana) has plump, oval, asymmetrical reddish or green buds, which bear only one or two bud scales.

The bud that forms at the end of a branch is referred to as the terminal bud and those along the length of the branch are lateral buds.  In the case of Basswood, the bud at the tip of the branch is a “false” terminal bud, because it is actually a lateral bud that has assumed the function of the terminal bud.  When the growing tip of the branch withers or falls away, the closest lateral bud to the twig tip substitutes as a terminal bud.

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2018 Naturally Curious Calendar

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Orders for the 2018 Naturally Curious Calendar can be placed by writing to me at 134 Densmore Hill Road, Windsor, VT 05089. The calendars are printed on heavy card stock and measure 11” x 17” when hanging. There is one full-page photograph per month. They are $35.00 each (includes postage). Please specify the number of calendars you would like to order, the mailing address to which they should be sent and your email address. Your check can be made out to Mary Holland and guaranteed orders can be placed up until November 15th. After this date, orders will be filled as long as my supply of calendars lasts. They are $35.00 each (includes postage). Calendars will arrive at your door by mid-December. Thank you so much!

 

 


Bud Scales

bud scales 147Much of this coming summer’s woody plant growth is contained in embryonic form inside a tree’s buds. Buds contain an undeveloped shoot, leaf, and/or flower. Formed last summer, these buds must survive the freezing and fluctuating temperatures, relatively dry air and the potential insect, bird and fungal damage that may occur during the fall, winter and early spring.

Bud scales, which are small, modified leaves, cover and protect many of these buds. The number of scales, their arrangement, color, presence or absence of hairs or sticky substances are often distinctive. Willows have one visible bud scale (actually two fused into one), whereas pine and fir buds may have anywhere from 100 to 350. The scales on a bud can either be arranged in pairs facing each other edgewise (American Basswood, pictured) or overlapping like shingles (Sugar Maple, pictured). Colors range from the wine-colored bud scales of Striped Maple to the mustard yellow Bitternut Hickory scales. The texture of bud scales has great variation, including the satiny-smooth hairy bud scales of Box Elder (pictured). Many bud scales, such as poplars, are covered by a gummy substance which serves as added protection.

A few trees and shrubs have buds that lack scales. These are referred to as “naked” buds, and often the embryonic leaves are quite hairy. Witch Hazel, Hobblebush and Staghorn Sumac (pictured) are species of woody plants lacking bud scales.

Most buds have multiple scales which, upon falling off when the bud opens, leave a series of horizontally-elongated scars on the surface of the growing stem. By means of these scars one can determine the age of a young branch, since each year’s growth ends in the formation of a terminal bud which produces an additional group of bud scale scars. Continued growth of the branch causes these scars to be indistinguishable after a few years so that the age of older branches cannot be determined by this means.

Naturally Curious is supported by donations. If you choose to contribute, you may go to http://www.naturallycuriouswithmaryholland.wordpress.com and click on the yellow “donate” button.