. Class-book of botany [microform] : being outlines of the structures, physiology, and classification of plants : with a flora of the United States and Canada. Botany; Botany; Plants; Plants; Botanique; Botanique; Plantes; Botanique. Fig. 61. Creeper of " Nimble Will," or witch-gTMS; a, Bud; ?>&, Bases of culms. 182. Utility. Repent stems of this kind are not, however, without their use. They frequently abound in loose, sandy soil, which they serve to bind and secure against the inroads of the water and even the sea itself. Holland is said to owe its very existence to the repe
. Class-book of botany [microform] : being outlines of the structures, physiology, and classification of plants : with a flora of the United States and Canada. Botany; Botany; Plants; Plants; Botanique; Botanique; Plantes; Botanique. Fig. 61. Creeper of " Nimble Will," or witch-gTMS; a, Bud; ?>&, Bases of culms. 182. Utility. Repent stems of this kind are not, however, without their use. They frequently abound in loose, sandy soil, which they serve to bind and secure against the inroads of the water and even the sea itself. Holland is said to owe its very existence to the repent stems of such plants as the mat-grass (Arundo arenaria), Carex arenarius and Elymus arenarius, which overran the artificial dykes upon its shores, and by their innumerable roots and creepers apparently bind the loose sand into a firm barrier against the washing of the waves. So the turf, chiefly conrposed of repent grass-stems, forms the only security of our own sandy or clayey hills against the washing rains. 183. The rhizome or root-stock differs from the creeper only in being shorter and thicker, having its internodes but partially developed. It is a prostrate, fleshy, rooting stem, either wholly or partially subter- ranean, often scaly with the bases of undeveloped leaves, or marked with the scars of former leaves, and yearly producing new shoots ancF roots. Such is the fleshy, horizontal portion of the blood-root, sweet- flag, water-lily, bramble (the latter hardly different from the creepei"). 184. The growth of the rhizome is instructive, marking its peculiar character. Kach joint marks the growth of a year. In spring the terminal bud unfolds into M 62 a. Fig. 63. Rhizoma of Solomon's-seal (Polyi^onatum multlflora) a, Fragment of the first year's irrowth ; 6, the second year's growth ; c, growth of the third year ; d, growth of the present (fMirth) year, bearlne the stem which, oo decaying, will leave a scar (seal) like the rest. 6S, Pr«' morse stem uf Trillium.
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Keywords: ., bookcentury1800, bookdecade, booksubjectbotany, booksubjectplants
