All Floras      Advanced Search
FOC Vol. 24 Page 281 Login | eFloras Home | Help
FOC | Family List | FOC Vol. 24 | Dioscoreaceae | Dioscorea

10. Dioscorea collettii J. D. Hooker, Fl. Brit. India. 6: 290. 1892.

叉蕊薯蓣 cha rui shu yu

Rhizome horizontal, ginger-shaped, variable in length, ca. 2 cm thick; transverse section yellow; roots slender, fibrous. Stem twining to left, glabrous, sometimes densely and shortly yellow hairy. Leaves alternate, simple; petiole 4--7 cm; leaf blade drying blackish, triangular to ovate or ovate-lanceolate, 5--19(--22) × 3--13(--16) cm, usually membranous, abaxially sometimes hispidulous especially along veins, base cordate to subtruncate, margin subentire or slightly undulate, sometimes transparent, apex acuminate. Male spikes solitary or 2 or 3 together. Male flowers: solitary or in cymules of 2 or 3, sessile; bracts ovate-lanceolate; bracteoles ovate; perianth yellow, usually drying black, saucer-shaped; stamens 3, inserted in perianth tube, filaments short, anthers ovoid, connectives elongate at anthesis, fork-shaped; staminodes filiform. Female spike solitary, to 5 cm. Female flowers: staminodes present; ovary terete. Capsule reflexed, brown, shiny, broadly obovoid or ellipsoid, usually somewhat angular, 1.6--2.1 cm, apex truncate; wings 0.8--1.1 cm wide. Seeds inserted near middle of capsule, winged all round. Fl. May--Aug, fr. Jun--Oct.

Mixed forests, secondary Quercus forests, scrub forests, mountain slopes; 200--3200 m. S Anhui, Fujian, N Guangdong, NE Guangxi, Guizhou, S Henan, Hubei, Hunan, Jiangxi, W Sichuan, N Taiwan, Yunnan, Zhejiang [India, Laos, Myanmar, Thailand, Vietnam].

1 Leaf blade not transparent at margin; anther connective often 1--2 × as wide as anther at anthesis; capsule broadly obovoid, apex truncate or rounded   10a var. collettii
+ Leaf blade transparent at margin; anther connective short, ca. 1/2 as wide as anther at anthesis; capsule broadly ellipsoid, apex rounded   10b var. hypoglauca


Flora of China @
Browse by
Advanced Search

Flora of China Home




 |  eFlora Home |  People Search  |  Help  |  ActKey  |  Hu Cards  |  Glossary  |