. Botany for high schools and colleges. Botany. NABGISSALES. 467 Alisma and Sagitta/ria are two common genera. 560. Cohort IX. Triurales, with one small and little known order. Order Triuridese.—Delicate, almoat colorless herbs of tlie tropics. 561. Cohort X. Bioscorales.—Climbing herbs or under- shrubs, bearing reticulately veined leaves. Order Dioscoreacese.—The Yam Family. Several species of Dios- eorea produce edible tubers. • D. saiiva, D. aculeata, and other species of India are extensively grown there and in the West Indies as potatoes are grown in cooler climates. D. Batatas and D. Jap
. Botany for high schools and colleges. Botany. NABGISSALES. 467 Alisma and Sagitta/ria are two common genera. 560. Cohort IX. Triurales, with one small and little known order. Order Triuridese.—Delicate, almoat colorless herbs of tlie tropics. 561. Cohort X. Bioscorales.—Climbing herbs or under- shrubs, bearing reticulately veined leaves. Order Dioscoreacese.—The Yam Family. Several species of Dios- eorea produce edible tubers. • D. saiiva, D. aculeata, and other species of India are extensively grown there and in the West Indies as potatoes are grown in cooler climates. D. Batatas and D. Japonica are known as Chinese Yams. Testudinaria elephantipes, of the Cape of Good Hope, is a curious Figs. 357-9.—Illttstratiosts op Alisma Fig. 357. Fig. 367.—Flower cut vertically. Magnified. Fig. 868.—Seed. Magnified. Fig. 369.—Section of seed. Magnified. Fig. 358. Fig. 359. green-house plant, having a large, woody, above-ground corm-stem, from which spring every year slender twining stems. 562. Cohort XI. Tfareissales.—Plants with narrow, often equitant leaves, having parallel venation; seeds containing endosperm. Order Hsemodoracese,—The Blood-wort Family. Order Amaryllidacese.—The Amaryllis Family. Distinguished from the next order by having six stamens, and leaves which are not equitant. The four hundred species are herbs of temperate and trop. ical climates ; many possess a narcotic and poisonous principle. Agave Americana, the Century Plant of Mexico, is now much grown in conservatories, and is said to be naturalized in Southern Europe. In- Califomia,and its native country it blooms at the age of from ten to. 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 Bessey, Charles E. (Charles Edwin), 1845-1915. New York : H. Holt
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