The elements of botany for The elements of botany for beginners and for schools elementsofbotany00gray Year: 1887 SECTION C] STEMS. 47 116. Bulblets are very small bulbs growing out of larger ones; small bulbs produced above ground on some plants, as in tlit- axils of leaves of the bulbilemus Lilies of I lie gardens (Fig. 110), and often in flower-clusters of the Leek and Onion. They are plainly buds with thickened scales. They never grow into branches, but detach themselves when full grown, fall to the ground, and take rool there to form new plants. 117. Consolidated Vegetation. An ordinary
The elements of botany for The elements of botany for beginners and for schools elementsofbotany00gray Year: 1887 SECTION C] STEMS. 47 116. Bulblets are very small bulbs growing out of larger ones; small bulbs produced above ground on some plants, as in tlit- axils of leaves of the bulbilemus Lilies of I lie gardens (Fig. 110), and often in flower-clusters of the Leek and Onion. They are plainly buds with thickened scales. They never grow into branches, but detach themselves when full grown, fall to the ground, and take rool there to form new plants. 117. Consolidated Vegetation. An ordinary herb, shrub, or tree is evidently constructed on the plan developing an extensive surface. In fleshy rootstocks, or the the I tubers, corms, and bulbs, the more enduring portion of the plant is con- centrated, and reduced for the time of struggle (as against drought, heat, or cold) to a small amount of exposed surface, and this mostly sheltered in the soil. There are many similar consolidated forms which are not subterranean. Thus plants like the Houseleek (Fig. 91) imitate a bulb. Among Cactuses the columnar species of Cereus (Fig. Ill, 6), may be lik- llu pned to rootstocks. A green riud serves the purpose of foliage; but the surface is as nothing compared with an ordinary leafy plant of the same bulk. Compare, for instance, the largest Cactus known, the Giant Cereus of the Gila River (Fig. Ill, in the background), which rises to the height of fifty or sixty feet, with a common leafy tree of the same height, such as that in Fig. 89, and estimate how vastly greater, even without the foli- age, the surface of the latter is than that of the former. Compare, in the
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