. Foundations of botany. Botany; Botany. FiQ. 110.—Opposite Leaves of Deutzia, as arranged on a Vertical Branch. in the figure above mentioned) are found in the so-called root-leaves of plants. Good examples of these are the dandelion, chicory, fall dandelion, thistle, hawk- weed, pyrola, plantain. How are the leaves of these plants kept from shading each other? 151. Much-Divided Leaves. — Not infre- quently leaves are cut iato slender fringe-like divisions, as in the carrot, tansy, southernwood, wormwood, yarrow, dog- fennel, cjrpress-vine, and many other common plants. This kind of leaf seem
. Foundations of botany. Botany; Botany. FiQ. 110.—Opposite Leaves of Deutzia, as arranged on a Vertical Branch. in the figure above mentioned) are found in the so-called root-leaves of plants. Good examples of these are the dandelion, chicory, fall dandelion, thistle, hawk- weed, pyrola, plantain. How are the leaves of these plants kept from shading each other? 151. Much-Divided Leaves. — Not infre- quently leaves are cut iato slender fringe-like divisions, as in the carrot, tansy, southernwood, wormwood, yarrow, dog- fennel, cjrpress-vine, and many other common plants. This kind of leaf seems to be adapted to offer considerable surface to the sun without cut- ting off too much light from other leaves underneath. Such a leaf is in much less danger of being torn by severe winds than are broader ones with undivided margins. The same purposes are served by compound leaves with very many small leaflets, such as those of the honey- locust, mimosa acacia (Fig. 113), and other trees and shrubs of the pea famUy. What kind of shade is produced by a horse-chestnut or a maple tree compared with that of a honey-locust or an acacia ?. Fio. 111. —Leaf-Mosaic of a Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bergen, Joseph Y. (Joseph Young), 1851-1917; Eastwood, Alice, 1859-1953. Boston, Ginn & Co.
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