托叶楼梯草Elatostema nasutum Hook. f.
托叶楼梯草Elatostema nasutum Hook. f.
46.托叶楼梯草（东北林学院植物研究室汇刊）图版47: 7-8（见232页）
Elatostema nasutum Hook. f. Fl. Brit. Ind. 5: 571. 1888; Grierson et Long, F1. Bhutan 1 (1): 120. 1983; W. T. Wang in Bull. Bot. Res. (Harbin) 12 (3): 207. 1992. ——E. sti pulosum Hand. -Mazz. Symb. Sin. 7: 149. 1929; W. T. Wang in Bull. Bot. Lab. N. -E. For. Inst. 7: 47. 1980; 云南种子植物名录, 上册, 724. 1984; 贵州植物志4: 54. 1989. ——E. ficoides auct. non Wedd. : 湖北植物志1: 175, 图229. 1976.
《Flora of China》 Vol. 5 (2003)
Elatostema nasutum J. D. Hooker
托叶楼梯草 tuo ye lou ti cao
Herbs perennial, dioecious, 15-45 cm tall. Stems ascending or erect, simple or branched, glabrous or puberulent. Leaves alternate; nanophylls absent; stipules narrowly ovate or linear, 9-18 × 1.5-4.5 mm, glabrous, without cystoliths; petiole 1-4 mm; leaf blade obliquely elliptic or elliptic-ovate, 3-9(-18) × 2-3.5(-6.5) cm, herbaceous, major basal lateral veins both arising at base of leaf blade, rarely 1 arising above base, both surfaces glabrous, or adaxial surface sparsely strigillose; cystoliths obscure, sparse; base with broader half cordate, margin dentate, apex acuminate. Male inflorescences solitary, simple, 4-14 mm in diam.; peduncle 3-60 mm, 0.8-1.2 mm in diam.; receptacle 2-6 mm in diam.; bracts 6, in 1 whorl, connate, cymbiform-ovate, equal, 2-5 mm; bracteoles linear. Female inflorescences solitary, 30-flowered or more, 3-9 mm in diam.; peduncle 0-1 mm; receptacle 2-5 mm in diam.; bracts triangular; bracteoles narrowly oblong. Male flowers 4-merous. Achenes ellipsoid, 10-ribbed. Fl. May-Oct.
Mountain forests, sparse forests, shaded areas on grassy slopes or in valleys; 400-2400 m. N and W Guangdong, N Guangxi, Guizhou, Hainan, Hubei, Hunan, W Jiangxi, Sichuan, SE Xizang, Yunnan [Bhutan, India, Sikkim, Nepal, Thailand].
别名：红叶楼梯草;冷草;大托叶楼梯草;梨序楼梯草;
科名：荨麻科 Urticaceae
属名：楼梯草属 Elatostema
46.托叶楼梯草（东北林学院植物研究室汇刊）图版47: 7-8（见232页）
Elatostema nasutum Hook. f. Fl. Brit. Ind. 5: 571. 1888; Grierson et Long, F1. Bhutan 1 (1): 120. 1983; W. T. Wang in Bull. Bot. Res. (Harbin) 12 (3): 207. 1992. ——E. sti pulosum Hand. -Mazz. Symb. Sin. 7: 149. 1929; W. T. Wang in Bull. Bot. Lab. N. -E. For. Inst. 7: 47. 1980; 云南种子植物名录, 上册, 724. 1984; 贵州植物志4: 54. 1989. ——E. ficoides auct. non Wedd. : 湖北植物志1: 175, 图229. 1976.
《Flora of China》 Vol. 5 (2003)
Elatostema nasutum J. D. Hooker
托叶楼梯草 tuo ye lou ti cao
Herbs perennial, dioecious, 15-45 cm tall. Stems ascending or erect, simple or branched, glabrous or puberulent. Leaves alternate; nanophylls absent; stipules narrowly ovate or linear, 9-18 × 1.5-4.5 mm, glabrous, without cystoliths; petiole 1-4 mm; leaf blade obliquely elliptic or elliptic-ovate, 3-9(-18) × 2-3.5(-6.5) cm, herbaceous, major basal lateral veins both arising at base of leaf blade, rarely 1 arising above base, both surfaces glabrous, or adaxial surface sparsely strigillose; cystoliths obscure, sparse; base with broader half cordate, margin dentate, apex acuminate. Male inflorescences solitary, simple, 4-14 mm in diam.; peduncle 3-60 mm, 0.8-1.2 mm in diam.; receptacle 2-6 mm in diam.; bracts 6, in 1 whorl, connate, cymbiform-ovate, equal, 2-5 mm; bracteoles linear. Female inflorescences solitary, 30-flowered or more, 3-9 mm in diam.; peduncle 0-1 mm; receptacle 2-5 mm in diam.; bracts triangular; bracteoles narrowly oblong. Male flowers 4-merous. Achenes ellipsoid, 10-ribbed. Fl. May-Oct.
Mountain forests, sparse forests, shaded areas on grassy slopes or in valleys; 400-2400 m. N and W Guangdong, N Guangxi, Guizhou, Hainan, Hubei, Hunan, W Jiangxi, Sichuan, SE Xizang, Yunnan [Bhutan, India, Sikkim, Nepal, Thailand].