. British plants; their biology and ecology. Botany; Botany; Plant ecology. INFLUENCE OF WATER ON LAND-PLANTS 37 exposed to the sun are always smaller than those which develop in partial shade, and the dwarfing of plants in exposed situations is due, in part at least, to this effect. Another kind of stunted growth is the rosette-iorm., characteristic of many plants living in regions either permanently or periodically dry or cold. The rosette- form, however, is permanent; it is iaherited, and there- fore independent of circumstances. In a rosette-plant— , London-pride (Fig. 5), the stem, th
. British plants; their biology and ecology. Botany; Botany; Plant ecology. INFLUENCE OF WATER ON LAND-PLANTS 37 exposed to the sun are always smaller than those which develop in partial shade, and the dwarfing of plants in exposed situations is due, in part at least, to this effect. Another kind of stunted growth is the rosette-iorm., characteristic of many plants living in regions either permanently or periodically dry or cold. The rosette- form, however, is permanent; it is iaherited, and there- fore independent of circumstances. In a rosette-plant— , London-pride (Fig. 5), the stem, through the sup- pression of the internodes, does not elongate, but bears. Fio. 5.—Lonbon-Pbidb, showino Rosbtte-Habit. (Natueal Size.) a number of closely-set radiating leaves close to the ground. These leaves provide a deep shade under which no other plants can grow, and in this way the plant frees itseK from competitors. The soU, being shaded, tends to remain moist beneath the leaves, and, as the stomata are found on the under surface, transpiration takes place in moist shade, and is therefore not excessive. Rosette-plants are common, not only in alpine regions, but in all grassy places where the herbage is low, and tall weeds are in danger of desiccation by violent winds. The presence of rosette-plants {, dandelion, daisy, plantain) in a damp meadow might appear to conflict. 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 Bevis, James Frederick; Jeffery, Henry John. London, Methuen
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbotany, bookyear1920
