. Class-book of botany: being outlines of the structure, physiology and classification of plants; with a flora of the United States and Canada. Botany; Plants; Plants. THE STEM, OR ASCENDING AXIS. into the air. The witch-grass (Triticum repens) is an example. Such plants are a sore evil to the garden. They can have no better cultiva- tion than to be torn and cut to pieces by the spade of the angry gar- dener, since they are thus multiplied as many times as there are fragments. 6 &. Fig. 51. Creeper of "Nimble Will," or witch-grass; a, Bud; bb, Bases of culms. 182. Utility. Repent
. Class-book of botany: being outlines of the structure, physiology and classification of plants; with a flora of the United States and Canada. Botany; Plants; Plants. THE STEM, OR ASCENDING AXIS. into the air. The witch-grass (Triticum repens) is an example. Such plants are a sore evil to the garden. They can have no better cultiva- tion than to be torn and cut to pieces by the spade of the angry gar- dener, since they are thus multiplied as many times as there are fragments. 6 &. Fig. 51. Creeper of "Nimble Will," or witch-grass; a, Bud; bb, 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 overrun the artificial dykes upon it3 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 composed 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 shoot3 and roots. Such is the fleshy, horizontal portion of the blood-root, sweet- flag, water-lily, bramble (the latter hardly different from the creeper). 184. The growth of the rhizome is instructive, marking its peculiar character. Each joint marks the growth of a year. In spring the terminal bud unfolds int© 52 52 o. Please note that these images are extracted from scanned page images t
Size: 2752px × 908px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubjectbotany, booksubjectplants, bookyear18
