栏目

石生楼梯草Elatostema rupestre (Buch.-Ham.) Wedd.

石生楼梯草Elatostema rupestre (Buch.-Ham.) Wedd.

科名:荨麻科 Urticaceae

属名:楼梯草属 Elatostema

《中国植物志》第23(2)卷285页
  95.石生楼梯草(东北林学院植物研究室汇刊)
  Elatostema rupestre (Buck. -Ham.) Wedd. in Arch. Mus. Hist. Nat. Paris, ser. 9: 304. 1856; in DC. Prodr. 16 (1): 177. 1869; Hook. f. Fl. Brit. Ind. 5: 564. 1888; W. T. Wang in Bull. Bot. Lab. N. -E. For. Inst. 7: 74. 1980.——Procris rupestris Buch. -Ham. in D. Don,Prodr. Fl. Nepal. 60. 1825.
  多年生草本。茎高46-60厘米,基部稍木质,不分枝,有数条纵棱,上部密被短糙毛,下部毛稀疏。叶具短柄,最上部者无柄;叶片草质,斜长椭圆形或倒卵状长椭圆形,长11-16厘米,宽3.8-5.2厘米,顶端渐尖,基部斜楔形,或在宽侧钝,边缘在基部之上至顶端有牙齿,上面散生少数短硬毛,下面沿脉有开展的毛,钟乳体明显,密,长约0.2毫米,半离基三出脉,侧脉在狭侧约4条,在宽侧约5条;叶柄长1.5-5.5毫米,有毛;托叶披针形,长约1.5毫米,疏被短柔毛。花序雌雄异株。雌花序具极短梗;花序托近长方形或椭圆形,长5-9毫米;苞片三角形或宽三角形,长约1毫米;小苞片多数,密集,匙形或狭条形,长1.2-1.5毫米,上部有短毛。瘦果卵球形,长约0.4毫米,约有8条纵肋。5月开花。
  产云南南部。生于山谷林中,海拔1 500米。尼泊尔、印度东北部也有分布。

《Flora of China》 Vol. 5 (2003)
Elatostema rupestre  (Buchanan-Hamilton ex D. Don) Weddell
石生楼梯草   shi sheng lou ti cao
Procris rupestris Buchanan-Hamilton ex D. Don, Prodr. Fl. Nepal. 60. 1825.
Herbs perennial, dioecious, 45-60 cm tall. Stems ascending or erect, simple, densely strigose. Leaves alternate; nanophylls absent; stipules lanceolate, 10-15 × 3-5 mm, sparsely strigillose, with cystoliths; petiole 1.5-5.5 mm; leaf blade obliquely elliptic or obovate-elliptic, 11-16 × 3.5-5.5 cm, herbaceous, major basal lateral veins asymmetric, 1 basal, the other arising above base, abaxial surface sparsely strigillose along nerves, adaxial surface sparsely hirtellous, cystoliths conspicuous, dense; base with broader half obtuse, margin dentate, apex acuminate. Female inflorescences solitary, 6-11 mm in diam.; peduncle ca. 1 mm; receptacle nearly quadrate, 5-9 mm; bracts triangular; bracteoles spatulate or linear. Achenes ovoid, 8-ribbed. Fl. May.
Valley forests; ca. 1500 m. S Yunnan [NE India, Nepal].

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