. Experiments with plants. Botany. 344 EXPERIMENTS WI7n PLANTS Light.—The effect of light on the plant is ordinarily much the same as that of dryness. In fact, some of the effects of strong light are due to the increased trans- piration which it produces. In the case of the desert- plants, etc., the effects of the two are difficult to distinguish. There are, however, many effects of light which are independent and are manifested equally. 199. Leaves of Prickly Lettuce seen in cross-section: (a) sun leaf, (&) shade leaf. well when the plant is grown in a saturated atmos- phere. Some plants
. Experiments with plants. Botany. 344 EXPERIMENTS WI7n PLANTS Light.—The effect of light on the plant is ordinarily much the same as that of dryness. In fact, some of the effects of strong light are due to the increased trans- piration which it produces. In the case of the desert- plants, etc., the effects of the two are difficult to distinguish. There are, however, many effects of light which are independent and are manifested equally. 199. Leaves of Prickly Lettuce seen in cross-section: (a) sun leaf, (&) shade leaf. well when the plant is grown in a saturated atmos- phere. Some plants (sun-plants) prefer the direct sun- shine, while others grow only in the shade (shade- plants). The latter (e. g., many Ferns, etc.) have leaves of paler color, relatively large and thin, and not well adapted to withstand direct sunlight: if exposed to it they soon die. Similar differences may be found in leaves growing on the same plant 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 Osterhout, Winthrop John Van Leuven, 1871-. New York, The Macmillan company; London, Macmillan & co. , ltd.
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