9. Argyreia monosperma C. Y. Wu, Yunnan Redai Yaredai Zhiwu Quxi Yanjiu Baogao (Rep. Stud. Pl. Trop. Subtrop. Yunnan). 1: 127. 1965.
单籽银背藤 dan zi yin bei teng
Shrubs scandent. Stems angular, young parts densely appressed sericeous pubescent, older ones glabrescent. Petiole 2.5-9.5 cm; leaf blade broadly ovate-elliptic to circular, 6-17 X 3.5-12 cm, abaxially silvery or grayish sericeous, adaxially glabrous, base broadly cuneate, truncate or rounded, rarely obtuse, apex acute; lateral veins 8-12 pairs. Inflorescences axillary, few flowered; peduncle 4-14 cm; bracts attenuate-lanceolate, 2-3.3 cm X 5-8 mm, sericeous abaxially, persistent. Pedicel 4-13 mm, angular. Sepals broadly ovate to elliptic, ± equal, 7-11 X 5-9 mm, to 1.8 1 cm in fruit, densely sericeous abaxially, glabrous adaxially, apex acute. Corolla purple or pinkish, urceolate-funnelform, 2.5-3.5 cm, apex appressed sericeous outside, otherwise glabrous; limb shallowly lobed. Stamens and pistil included; filaments glandular pubescent basally; anthers oblong. Disc cupular, 0.5-1.5 mm high. Ovary glabrous. Stigma capitate, 2-lobed. Berry reddish purple, ellipsoid, 1.5-1.7 cm. Seed 1, reddish purple, ellipsoid, ca. 1.2 X 0.9 cm, shiny.
* Valley forests, open thickets; 1000-1800 m. Yunnan (Menghai Xian, Pingbian Xian).