. Elements of botany. Botany. 108 ELEMENTS OF BOTANY the sun without cutting off too much light from other leaves underneath. Sueli a leaf is in much less clanger 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. 77), and. Fig. 74. Opposite Loaves of nentzia^ (from the same shrub as Fig. 75), as arranged on a Horizontal Branch. other trees and shrubs of the pea family. What kind of shade is produced by a horse-chestnut or a maple tree c
. Elements of botany. Botany. 108 ELEMENTS OF BOTANY the sun without cutting off too much light from other leaves underneath. Sueli a leaf is in much less clanger 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. 77), and. Fig. 74. Opposite Loaves of nentzia^ (from the same shrub as Fig. 75), as arranged on a Horizontal Branch. other trees and shrubs of the pea family. What kind of shade is produced by a horse-chestnut or a maple tree compared with that of a honey-locust or an acacia? 127. Daily Movements of Leaves.—Many compound leaves have the power of changing the position of their leaflets to accommodate themselves to varying conditions of light and tt'mperatnre. Some plants have the power of directing the leaves or leaflets edgewise towards the sun during the hottest parts of the day, allowing them to 1 Deutzia 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. Boston, Ginn
Size: 2102px × 1189px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1904
