钝齿楼梯草Elatostema obtusidentatum W. T. Wang
钝齿楼梯草Elatostema obtusidentatum W. T. Wang
7.钝齿楼梯草（东北林学院植物研究室汇刊）图版44: 5
Elatostema obtusidentatum W. T. Wang in Bull. Bot. Lab. N.-E. For. Inst. 7: 28. 1980.
亚灌木。茎高约30厘米，分枝，无毛。叶无柄或具极短柄；叶片草质或薄纸质，斜狭长圆形或长圆状倒披针形，长6.2-12厘米，宽1.8-3厘米，顶端骤尖或长渐尖（尖头全缘），基部在狭侧楔形，在宽侧钝或近耳形，边缘在狭侧上部或中部以上，在宽侧中部以上有钝牙齿，上面散生少数短硬毛，下面沿中脉及侧脉疏被短糙毛，钟乳体明显，密，长0.15-0.35毫米，叶脉近羽状或近半荨基三出脉，侧脉在狭侧4-5条，在宽侧4-6条；叶柄长达1毫米，无毛；托叶钻形，长1-2毫米，无毛。雄花序具梗，单生叶腋，直径8-10毫米，二回分枝，稀疏，花密集分枝顶端；花序梗长2-4.5毫米，与花序分枝均被极短的毛；苞片条状披针形，长约0.8毫米。雄花蕾直径约0.6毫米，四基数，花被片外面有短突起。花期11月。
产广西北部（融水）（模式产地）。生于山地林中。
《Flora of China》 Vol. 5 (2003)
Elatostema obtusidentatum W. T. Wang
钝齿楼梯草 dun chi lou ti cao
Subshrubs, dioecious, ca. 30 cm tall. Stems ascending or erect, branched, glabrous. Leaves alternate; nanophylls absent; stipules subulate, 1-2 × 0.1-0.2 mm, glabrous; petiole 0-1 mm; leaf blade obliquely oblong or oblong-oblanceolate, 6-12 × 1.5-3 cm, herbaceous or papery, major basal lateral veins absent and venation pinnate, or ± asymmetric with 1 basal and the other arising above base, abaxial surface sparsely strigillose along nerves, adaxial surface sparsely hirtellous, cystoliths conspicuous, dense; base with broader half obtuse, margin obtusely denticulate, apex cuspidate or acuminate. Male inflorescences solitary, branched, 8-10 mm in diam.; peduncle 2-4.5 mm; receptacle absent; bracts alternate, linear-lanceolate, ca. 0.8 mm. Male flowers 4-merous. Fl. Nov.
* Mountain forests. N Guangxi.
别名：钝叶楼梯草;
科名：荨麻科 Urticaceae
属名：楼梯草属 Elatostema
7.钝齿楼梯草（东北林学院植物研究室汇刊）图版44: 5
Elatostema obtusidentatum W. T. Wang in Bull. Bot. Lab. N.-E. For. Inst. 7: 28. 1980.
亚灌木。茎高约30厘米，分枝，无毛。叶无柄或具极短柄；叶片草质或薄纸质，斜狭长圆形或长圆状倒披针形，长6.2-12厘米，宽1.8-3厘米，顶端骤尖或长渐尖（尖头全缘），基部在狭侧楔形，在宽侧钝或近耳形，边缘在狭侧上部或中部以上，在宽侧中部以上有钝牙齿，上面散生少数短硬毛，下面沿中脉及侧脉疏被短糙毛，钟乳体明显，密，长0.15-0.35毫米，叶脉近羽状或近半荨基三出脉，侧脉在狭侧4-5条，在宽侧4-6条；叶柄长达1毫米，无毛；托叶钻形，长1-2毫米，无毛。雄花序具梗，单生叶腋，直径8-10毫米，二回分枝，稀疏，花密集分枝顶端；花序梗长2-4.5毫米，与花序分枝均被极短的毛；苞片条状披针形，长约0.8毫米。雄花蕾直径约0.6毫米，四基数，花被片外面有短突起。花期11月。
产广西北部（融水）（模式产地）。生于山地林中。
《Flora of China》 Vol. 5 (2003)
Elatostema obtusidentatum W. T. Wang
钝齿楼梯草 dun chi lou ti cao
Subshrubs, dioecious, ca. 30 cm tall. Stems ascending or erect, branched, glabrous. Leaves alternate; nanophylls absent; stipules subulate, 1-2 × 0.1-0.2 mm, glabrous; petiole 0-1 mm; leaf blade obliquely oblong or oblong-oblanceolate, 6-12 × 1.5-3 cm, herbaceous or papery, major basal lateral veins absent and venation pinnate, or ± asymmetric with 1 basal and the other arising above base, abaxial surface sparsely strigillose along nerves, adaxial surface sparsely hirtellous, cystoliths conspicuous, dense; base with broader half obtuse, margin obtusely denticulate, apex cuspidate or acuminate. Male inflorescences solitary, branched, 8-10 mm in diam.; peduncle 2-4.5 mm; receptacle absent; bracts alternate, linear-lanceolate, ca. 0.8 mm. Male flowers 4-merous. Fl. Nov.
* Mountain forests. N Guangxi.