49. Disperis Swartz, Kongl. Vetensk. Acad. Nya Handl. 21: 218. 1800.
双袋兰属 shuang dai lan shu
Authors: Xinqi Chen, Stephan W. Gale & Phillip J. Cribb
Herbs, terrestrial, slender. Tuber ovoid to globose. Stem erect, unbranched, fleshy, glabrous or pubescent, with a few scattered or clustered leaves. Leaves basal or cauline, lanceolate, ovate, or subcordate, often very small, base amplexicaul, margin entire. Inflorescence terminal, racemose, 1- to several flowered; floral bracts foliaceous, similar to leaves. Flowers resupinate; ovary twisted. Dorsal sepal connate to or connivent with petals and forming a hood, usually erect, narrow; lateral sepals often connate at base, saccate or spurred near middle. Petals falcate, broader than dorsal sepal; lip narrowly clawed; claw adnate to base of column; blade variable in shape, often 3-lobed, smooth, verrucose or pubescent. Column short, sessile; anther 2-locular, attached to column by a short filament; pollinia 2, granular-farinaceous, sectile, attached by slender caudicles to large viscidia, borne at apices of rostellum arms; stigma 2-lobed, confluent or consisting of 2 separate areas, located toward apex of column or dorsally near base of rostellum arms; rostellum with 2 long, twisted arms and flat central lobe. Capsule fusiform.
About 75 species: mainly in S and tropical Africa, with a few species extending to tropical and subtropical Asia; one species in China.