腺梗豨莶 xian geng xi xian

Sigesbeckia orientalis Linnaeus f. pubescens Makino, Bot. Mag. (Tokyo) 18: 100. 1904; S. orientalis subsp. pubescens (Makino) H. Koyama.

Annuals. Stems 60-120 cm tall, densely white pubescent, especially on upper part. Median cauline leaves ovate to deltate-ovate, 7-19 × 6-18 cm, short appressed pubescence on both surfaces, veins on lower surface densely white pubescent. Capitula radiate, ca. 20 mm wide; peduncle 15-35 mm, densely glandular pilose; phyllaries linear, rounded at apex, glandular pilose at base. Ray limb ca. 3.5 mm, shallowly 2- or 3-toothed, tube ca. 1.5 mm; disk corolla 2-2.5 mm, 5-toothed, tube 0.5-1 mm, pilose. Achenes 2.5-3.5 mm. Fl. May-Aug, fr. Jun-Oct. 2n = 30.

Mountain slopes, forest margins, thickets, grasslands; below 3400 m. Anhui, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hainan, Hebei, Henan, Hubei, Hunan, Jilin, Liaoning, Jiangsu, Jiangxi, Nei Mongol, Shaanxi, Sichuan, Taiwan, Xizang, Yunnan, Zhejiang [India, Japan, Korea].