骤尖楼梯草Elatostema cuspidatum Wight
骤尖楼梯草Elatostema cuspidatum Wight
78. 骤尖楼梯草（东北林学院植物研究室汇刊） 半边扇（四川南川）、冷水草（湖南）
Elatostema cuspidatum Wight, Ic. Pl. Ind. Or. 6: 11, t. 1983. 1853; W. T. Wang in Bull. Bot. Lab. N. -E. For. Inst. 7: 69. 1980; 西藏植物志1: 551. 1983; 云南种子植物名录, 上册, 720.1984; 贵州植物志4: 61.1989. ——E. sessile J. et G. Forster var. cuspidatum (Wight) Wedd. in DC. Prodr 16 (1): 173. 1869; Hook. f. Fl. Brit. Ind. 5: 564. 1888; Hand. -Mazz. Symb. Sin. 7: 145. 1929; 湖北植物志1: 178-1976, p. p. ——E. bodinieri Levl. in Repert. Spec. Nov. Regni Veg. 11: 551. 1913.
《Flora of China》 Vol. 5 (2003)
Elatostema cuspidatum Wight
骤尖楼梯草 zhou jian lou ti cao
Herbs perennial, monoecious or dioecious, 25-90 cm tall. Stems ascending or erect, simple or rarely branched, lower stems ferruginous-furfuraceous, glabrous. Leaves alternate; nanophylls absent; stipules linear or linear-lanceolate, 5-10(-20) × 2-3 mm, glabrous, with cystoliths; petiole 0-3 mm; leaf blade obliquely elliptic or oblong, 2-13.5(-23) × 1-5(-8) cm, herbaceous, major basal lateral veins asymmetric, 1 basal, the other arising above base, both surfaces glabrous or adaxial surface sparsely strigillose; cystoliths conspicuous, dense; base with broader half broadly cuneate or nearly auriculate, margin dentate, apex cuspidate. Male inflorescences solitary, simple, 6-12 mm in diam.; peduncle 1.5-4 mm; receptacle oblong, 6-11 × 5-7 mm; bracts connate, 0.5-1.6 mm; bracteoles oblong or cymbiform-oblong. Female inflorescences solitary, 3-15 mm in diam.; peduncle 0.5-1 mm; receptacle 2-13 mm in diam.; bracts broadly ovate or triangular; bracteoles narrowly linear. Male flowers 4-merous. Achenes narrowly ellipsoid, 8-ribbed. Fl. May-Oct.
Valley streamsides, rock crevices, forests; 900-2800 m. NW Fujian, W Guangxi, Guizhou, SW Hubei, Hunan, SW Jiangxi, Sichuan, S Xizang, Yunnan [NE India, Myanmar, Nepal].
别名：尖头楼梯草;聚尖楼梯草;
科名：荨麻科 Urticaceae
属名：楼梯草属 Elatostema
78. 骤尖楼梯草（东北林学院植物研究室汇刊） 半边扇（四川南川）、冷水草（湖南）
Elatostema cuspidatum Wight, Ic. Pl. Ind. Or. 6: 11, t. 1983. 1853; W. T. Wang in Bull. Bot. Lab. N. -E. For. Inst. 7: 69. 1980; 西藏植物志1: 551. 1983; 云南种子植物名录, 上册, 720.1984; 贵州植物志4: 61.1989. ——E. sessile J. et G. Forster var. cuspidatum (Wight) Wedd. in DC. Prodr 16 (1): 173. 1869; Hook. f. Fl. Brit. Ind. 5: 564. 1888; Hand. -Mazz. Symb. Sin. 7: 145. 1929; 湖北植物志1: 178-1976, p. p. ——E. bodinieri Levl. in Repert. Spec. Nov. Regni Veg. 11: 551. 1913.
《Flora of China》 Vol. 5 (2003)
Elatostema cuspidatum Wight
骤尖楼梯草 zhou jian lou ti cao
Herbs perennial, monoecious or dioecious, 25-90 cm tall. Stems ascending or erect, simple or rarely branched, lower stems ferruginous-furfuraceous, glabrous. Leaves alternate; nanophylls absent; stipules linear or linear-lanceolate, 5-10(-20) × 2-3 mm, glabrous, with cystoliths; petiole 0-3 mm; leaf blade obliquely elliptic or oblong, 2-13.5(-23) × 1-5(-8) cm, herbaceous, major basal lateral veins asymmetric, 1 basal, the other arising above base, both surfaces glabrous or adaxial surface sparsely strigillose; cystoliths conspicuous, dense; base with broader half broadly cuneate or nearly auriculate, margin dentate, apex cuspidate. Male inflorescences solitary, simple, 6-12 mm in diam.; peduncle 1.5-4 mm; receptacle oblong, 6-11 × 5-7 mm; bracts connate, 0.5-1.6 mm; bracteoles oblong or cymbiform-oblong. Female inflorescences solitary, 3-15 mm in diam.; peduncle 0.5-1 mm; receptacle 2-13 mm in diam.; bracts broadly ovate or triangular; bracteoles narrowly linear. Male flowers 4-merous. Achenes narrowly ellipsoid, 8-ribbed. Fl. May-Oct.
Valley streamsides, rock crevices, forests; 900-2800 m. NW Fujian, W Guangxi, Guizhou, SW Hubei, Hunan, SW Jiangxi, Sichuan, S Xizang, Yunnan [NE India, Myanmar, Nepal].