. Outlines of botany for the high school laboratory and classroom (based on Gray's Lessons in botany) Prepared at the request of the Botanical Dept. of Harvard University. Botany; Botany. ulblets ul' the Ti^ei" Lilv. as this perhaps represent the first step in the process of cliange by ^yhich tlie ancestors of our Bellwort (Fig. 20) and Bloodroot (Fig. 25) became subterranean in liabit. 86. Stems for propagation; that is, for tlie establish- ment of new individnal plants. ^lanjr plants reproduce their kind without the intervention of seed. Some part of the original plant is separated from
. Outlines of botany for the high school laboratory and classroom (based on Gray's Lessons in botany) Prepared at the request of the Botanical Dept. of Harvard University. Botany; Botany. ulblets ul' the Ti^ei" Lilv. as this perhaps represent the first step in the process of cliange by ^yhich tlie ancestors of our Bellwort (Fig. 20) and Bloodroot (Fig. 25) became subterranean in liabit. 86. Stems for propagation; that is, for tlie establish- ment of new individnal plants. ^lanjr plants reproduce their kind without the intervention of seed. Some part of the original plant is separated from the parent stock and develojjs into a new plant. This is termed vegetative reproduction, to distinguish it from reproduction by seed. The Potato is regularly propagated by this method, as also in the tropics are Sugar Cane, the Banana, and the Pineapiple, none of wliich ordinaril}' produce seed. 87. A curious mode of vegetative reproduction is by the bulblets, or small bulbs, formed in the axils of the leaves of certain garden Lilies (Fig. 43), and often in the flower clusters of the Onion. They are plainly buds â with thickened scales. They never grow into branches, but detach themselves â ndien full grown, fall to the ground, and take root there to form ne^Y plants. 88. A stolon is a branch from above ground, vhicli reclines or becomes prosti-ate and strikes root (usually from the nodes) \Yherever it rests on tlie soil. Tlience it may send up a vigorous shoot, wliich has I'Ofits of its o«n, and becomes au independent jdantwhen tlie connecting part dies, as it, dues after a while. 89. An offset is a short stolon, or sucker, with a crown of leaves at the end, as in the Houseleek (Fig. 44), which propagates abundantly in tins way. 90. A runner, of which the Straw- l)eny presents the most familiar and characteiistic example, is a long and slender, tendril-like stolon, or branch from next the ground, destitute of conspicuous leaves. Kach rininef of tlie Strawberry, after ha\
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