. Botany for academies and colleges: consisting of plant development and structure from seaweed to clematis. Botany; 1889. ROOT AND SUBTERRANEAN STEM. 75. but are found also in some Exogens,—the Sweet Potato, Dahlia, Peony, etc. They are Fibrous (thread-like) in the Grasses (Figs. 6, 57); Tuberous, or tuber- like, in the Yam (Fig. 89) and Sweet Potato. 145, Tuberous roots are distinguishable from the true tuber in being without buds, or Eyes; they develop leaves and stems only from the ex- tremity. (Compare Pigs. 89 and 95.) They are Coralline, like coral, in the Coral-root Orchid; Fasciculate
. Botany for academies and colleges: consisting of plant development and structure from seaweed to clematis. Botany; 1889. ROOT AND SUBTERRANEAN STEM. 75. but are found also in some Exogens,—the Sweet Potato, Dahlia, Peony, etc. They are Fibrous (thread-like) in the Grasses (Figs. 6, 57); Tuberous, or tuber- like, in the Yam (Fig. 89) and Sweet Potato. 145, Tuberous roots are distinguishable from the true tuber in being without buds, or Eyes; they develop leaves and stems only from the ex- tremity. (Compare Pigs. 89 and 95.) They are Coralline, like coral, in the Coral-root Orchid; Fasciculate, bundled, in the Asphodel (Fig. 56); Filipendulous, hanging sep- arately at the end of a long Fio. 89.—Kt., St., with IvB. and fls., of Yam fibre, in the Dropwort; (Dwscorea aativa) of West Indies and Southern JMonilifoTTn, necklace-like, States. Lts. do not show the ribs plainly enough. ];]je a string of beads, in the Pelargonium and Ipecac (Fig. 90). 146. Air-Plants, or Epiphytes (Gr. epi, upon, phyton, plant), do not grow in the ground, but rest upon other plants, and draw their food from the air. They are chiefly of the Orchis and Pine- Apple Orders, growing in warm, moist climates. The Magnolia Orchis () and Spanish, or Florida, Moss [Tillandsia) are examples. In these the roots serve the same purpose as in other plants,—support and absorption. 147. Adventitious, or Sec- ondary Roots will spring from any part of the stem if it be favorably placed. We see this in cuttings and slips. The In- dian Corn and Sugar-Cane send out secondary roots from several joints near the ground; the Mangrove of our Southern States sends them out in such size and abundance that it gets its generic name-^ Rhizophora, Koot-bearer—from them. The Banyan (Fig. 91) sends them down from its wide branches, making a miniature forest; one. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appeara
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