. Plant studies; an elementary botany. Botany. Fig. 3a. from the position in light. If such a plant is exposed to the light in a window and the positions of the leaves noted, and then turned half way around, so as to bring the other side to the light, the leaves may be observed to adjust them- selves gradually to the changed light-relations. 15. Compass plants.—A striking illustration of a special light position is found in the so-called '•compass ; The best known of these plants is the rosin-weed of the prairie region. Growing in situations exposed to intense light, the leaves are
. Plant studies; an elementary botany. Botany. Fig. 3a. from the position in light. If such a plant is exposed to the light in a window and the positions of the leaves noted, and then turned half way around, so as to bring the other side to the light, the leaves may be observed to adjust them- selves gradually to the changed light-relations. 15. Compass plants.—A striking illustration of a special light position is found in the so-called '•compass ; The best known of these plants is the rosin-weed of the prairie region. Growing in situations exposed to intense light, the leaves are turned edgewise, the Hat faces being turned away from the intense rays of midday, and directed towards the rays of less intensity ; that is, those of. Fig. Zb. The night position of the leaves of redbud (Cercis).—After 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 Coulter, John Merle, 1851-1928. New York, D. Appleton and Company
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