. College botany; structure, physiology and economics of plants. Botany. 336 COLLEGE BOTANY The fig {Ficus sarica) (Fig. 171), the rubber plant {F. elas- tica), the banyan tree {F. hengcdensis), and the hemp (Cannabis sativa) belong to this family. PoLYGOKACiEjr' (Bvickwheat Family).—Herbs; stems with swoUenjoints; leaves alternate with sheathing stipules; flowers perfect (or polygamous) ; calyx three- to six-cleft and more or less persistent, the inner circle sometimes peta- loid; stamens one to nine (sometimes more) ; ovary one- chambered with two or three styles; fruit a one-celled, three-
. College botany; structure, physiology and economics of plants. Botany. 336 COLLEGE BOTANY The fig {Ficus sarica) (Fig. 171), the rubber plant {F. elas- tica), the banyan tree {F. hengcdensis), and the hemp (Cannabis sativa) belong to this family. PoLYGOKACiEjr' (Bvickwheat Family).—Herbs; stems with swoUenjoints; leaves alternate with sheathing stipules; flowers perfect (or polygamous) ; calyx three- to six-cleft and more or less persistent, the inner circle sometimes peta- loid; stamens one to nine (sometimes more) ; ovary one- chambered with two or three styles; fruit a one-celled, three- or four-angled or sometimes winged achene. The common buckwheat (Fagopyrum esculentwm and other species) (Figs. 172, 173) is a native of Asia which has been widely distributed throughout the world. The rhubarb or pie-plant (Rheum rhaponticinii and other species) is a well-known garden plant which probably originated in Asia. It is also used in medicine. This family also includes the common docks and sorrels (Rumex sp.), the grass or smartweeds (Polygonum sp.) and a number of other familiar plants. Chenopodiace^ts (Goosefoot Family).—Mostly herbs; leaves alternate; inflorescence in spikes; flowers small and green- ish ; calyx five-cleft and persistent; stamens five or less; ovary. Fig. 174.—The table Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Cook, Melville Thurston, 1869-1952. Philadelphia and London, J. B. Lippincott Company
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