. Botany; principles and problems. Botany. THE PLANT AND ITS ENVIRONMENT 161 Toward light, as toward temperature, plants display certain inherited adaptations. Some green plants are able to thrive in light of comparatively low intensity and are said to be tolerant (Fig. 79), in the sense that they will tolerate a considerable degree of shade. Others will grow normally only where the illumination. Fig. 79.—Plants tolerant of shade. These broad-leaved plants of Viburnum are able to thrive on the forest floor, where the lower branches of the forest trees have died from lack of light. is good, and
. Botany; principles and problems. Botany. THE PLANT AND ITS ENVIRONMENT 161 Toward light, as toward temperature, plants display certain inherited adaptations. Some green plants are able to thrive in light of comparatively low intensity and are said to be tolerant (Fig. 79), in the sense that they will tolerate a considerable degree of shade. Others will grow normally only where the illumination. Fig. 79.—Plants tolerant of shade. These broad-leaved plants of Viburnum are able to thrive on the forest floor, where the lower branches of the forest trees have died from lack of light. is good, and are said to be intolerant (of shade). Some are sensi- tive to intense light and thus cannot live in the open, whereas others, either through the greater resisting power of their proto- plasm or through various structural modifications, are able to withstand the most brilliant sunlight. Gravity.^—Gravity in its effect upon plants is unlike tempera- ture and light in that it is both continuous in action and constant in amount. It is a very important factor in determining the direction of growth in plant parts and, like light, it affects different organs in different ways. Any reaction to the stimulus. 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 Sinnott, Edmund Ware, 1888-. New York, McGraw-Hill
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbotany, bookyear1923
