. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches, and a synopsis of the vegetable kingdom. Gardening -- Dictionaries; Plants -- North America encyclopedias. DIOON lanugindsum, Hort., is a very W00II5- kind. Gt. 48, pp. l.)4, irifi. —A variable species. D. toiiieiih'isKiii, once sold by l^itfhiT and Manda, was probalily wooUii-r than the type. U. tipinulosum. Dyer, differs
. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches, and a synopsis of the vegetable kingdom. Gardening -- Dictionaries; Plants -- North America encyclopedias. DIOON lanugindsum, Hort., is a very W00II5- kind. Gt. 48, pp. l.)4, irifi. —A variable species. D. toiiieiih'isKiii, once sold by l^itfhiT and Manda, was probalily wooUii-r than the type. U. tipinulosum. Dyer, differs mainly in having the segments margined with small sharp points. Mex. 7:461. W. M. DIOSCOEfiA (Dioscorides, the Greek naturalist). Viosrortdcrd . 'I'lie type genus of a small family (of about 8 piirra) allied to Liliacese. It contains upwards of 15Q widily dispersed and confused species, most of them native to tropical regions. Stems herbaceous and twining or long-procumbent, usually from a large tuber- ous root, and sometimes bearing tubers in the axils. Lvs. broad, ribbed and netted-veined, petiolate, alternate or opposite, sometimes compound. Dioecious. Fls. small; calyx0-parted, anthers6; styles3, ovary 3-loculed and calyx adherent to it. Fr. a 3-winged capsule. Seeds winged. The great subterranean tubers of some species are eaten in the manner of potatoes. For an inquiry into the prehistoric cultivation of Diosooreas in America, see Gray & Trumbull, Amer. Journ. Sci. 25:250. A. Sfevis strongly winged. alMa, Linn. Fig. 714. Stem 4-winged orangular: lvs. opposite, cordate-oblong or cordate-ovate, with a deep, basal sinus, glabrous, devoid of pellucid dots, 7- nerved (sometimes 9-nerved), with the outer pair united: staminate spikes compound, special ones whorled, short, flexuose : pistillate spikes simple : fls. distant, anthers aubglobose, about as long as the filaraent: capsule leathery, elliptical. India and the S. Sea Islands. — Widely cult, in the tropics u
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