. Botany for secondary schools; a guide to the knowledge of the vegetation of the neighborhood. Plants. WATER LIFE 207 only i-n water, and white oaks only on dry land, but it is seldom that either the water-lily or the oak finds the most congenial place in which to grow. Fine large plants of the lily and strong giant trees of the oak are so infrequent, as com- pared with the whole number, that we stop to admire them. 358. Originally, plants probably were aquatic, as animals were. Much of the earth was sea. Many plants are now aquatic, and the larger number of these—as algae and their kin—belon
. Botany for secondary schools; a guide to the knowledge of the vegetation of the neighborhood. Plants. WATER LIFE 207 only i-n water, and white oaks only on dry land, but it is seldom that either the water-lily or the oak finds the most congenial place in which to grow. Fine large plants of the lily and strong giant trees of the oak are so infrequent, as com- pared with the whole number, that we stop to admire them. 358. Originally, plants probably were aquatic, as animals were. Much of the earth was sea. Many plants are now aquatic, and the larger number of these—as algae and their kin—belong to the lower or older forms of plant life. Many plants of higher organization, however, as the water-lilies, have taken to aquatic life. True aquatic plants are those that always live in water, and that die when the water dries up. They are to be distinguished from those that live on shores or in swamps. Aquatic plants may be wholly im- mersed or under water, or partly emersed or standing above the water. Most flowering aquatic plants come to the surface to expand their flowers or to ripen their fruits. Some aquatic plants are free-swimming, or not attached to the bottom. Of this kind are some utricularias or bladder-worts. In some waters, particularly in the ocean, there are enormous quanti- ties of free-swimming microscopic life, both animal and vegetable, which is carried about by currents: this is known under the general ^>v- name of plankton ^^if^^^^^-^-^ (Greek for "wander- " \ ;'fy3ftfei*V*h ing" or "roaming"). /^\ / ^V^fvLv?'-'" 359. The general --^'. tendency has been for plants to become terrestrial, or land-in- habiting. Terrestrial plants often grow in ^ v~. -_-" wet places, but never 373" The ,ichen erows on the hard rock- in water throughout their entire life; of such are swamp, bog and marsh plants. Some plants have the ability to grow. Please note that these images are extracted from scanned page images that may h
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectplants, bookyear1913
