蓝耳草 lan er cao

Tradescantia vaga Loureiro, Fl. Cochinch. 1: 193. 1790; Cyanotis barbata D. Don; C. bulbosa H. Léveillé; C. nobilis Hasskarl.

Herbs perennial, bulbiferous. Bulbs globose. Stems amply branched usually from base, or distally, or few branched, 10--60 cm. Leaves all cauline; leaf blade linear to lanceolate, 5--10(--15) cm × 3--10(--15) mm, abaxially glabrous or sparsely pubescent. Cincinni solitary, rarely terminal and also with flowers in axillary heads; peduncle present or absent; bracts 5--10 mm. Sepals connate at base, oblong-lanceolate, ca. 5 mm, abaxially white hirsute. Petals purple or blue-purple, 6--8 mm. Filaments blue lanate. Capsule obovoid, trigonous, ca. 2.5 mm, hirsutulous at apex. Seeds gray-brown, striate and finely reticulate. Fl. Jul--Sep, fr. Oct.

Forests or grassy slopes; near sea level to 3300 m. Guangdong (Guangzhou Shi), Guizhou, W Hainan (Dongfang Xian), S Sichuan, Taiwan, S Xizang, Yunnan [Bhutan, India, Laos, Myanmar, Nepal, Sikkim, Thailand, Vietnam].