大花双参 da hua shuang shen

Triplostegia delavayi Franchet ex Diels.

Herbs, perennial, erect, 20-45 cm tall. Taproots often dichotomous, nearly fusiform, 30-40 × ca. 5 mm, slightly fleshy. Rhizomes short, nodes 2-4, internodes ca. 1 cm. Stems solitary, simple, slightly 4-angular, white villous, sometimes glandular hairy above. Leaves opposite, sessile, slightly amplexicaul, obovate to obovate-lanceolate, 3-8 cm, both surfaces villous, base cuneate, apex rounded, pinnatifid or pinnatilobate; terminal lobe largest, all lobes serrate; upper leaves gradually smaller and becoming bractlike. Inflorescence branches elongate, densely white villous and glandular hairy; bracts leaflike to linear, 5-20 mm, 1-veined, white villous and glandular hairy, margin shallowly serrate or entire, apex obtuse; pedicels 2-3 mm; outer involucel 4-lobed; lobes lanceolate, 2-3 mm, densely covered with black glandular hairs, apex acute; inner involucel ovoid, 8-ribbed; limb 5-dentate, teeth acute at base, hirsute. Calyx reduced. Corolla whitish rose, funnelform, nearly actinomorphic, 1-1.2 cm, outside sparsely puberulent, 5-lobed; lobes ca. 1/3 as long as total length of corolla, apex obtuse. Stamens slightly exserted; anthers yellow, introrse. Ovary enveloped by urceolate involucel; style shorter than stamens; stigma capitate. Achenes enveloped in involucels; lobes not hooked. Fl. and fr. Jul-Oct.

Forests, forest margins, grassy slopes; 2000-3000 m. SW Sichuan, N Yunnan [Bhutan].