| 摘要: |
| 该文描述了荨麻科楼梯草属2新种,其中发现自贵州的安龙楼梯草与条叶楼梯草近缘,与后者的区别在于此新种的茎和叶无毛,叶片椭圆形或狭倒卵形,较宽,雄苞片无角状突起,雌头状花序无梗,其花序托不等3～4裂,柱头画笔头状; 自广西发现的厚序楼梯草与福贡楼梯草近缘,与后者的区别在于此新种的叶片质地较薄,呈膜质,上面疏被糙伏毛,叶柄较短,长达2 mm或不存在,雄花序梗圆柱形,较长,密被短柔毛,雄总苞由一层不具角状突起的苞片组成。 |
| 关键词: 荨麻科, 楼梯草属, 新种, 中国 |
| DOI：10.11931/guihaia.gxzw201506020 |
| 分类号: |
| 文章编号:1000-3142(2016)09-1019-04 |
| Fund project: |
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| Two new species of Elatostema(Urticaceae)from China |
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WANG Wen-cai
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State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
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| Abstract: |
| Two species of the genus Elatostema(Urticaceae)are described as new, of which, E. anlongense was discovered from Guizhou Provice, and is related to E. sublineare W. T. Wang, differing from the latter in its glabrous stems and leaves, braoder long elliptic or narrowly obovate leaf blades, not corniculate staminate bracts, sessile pistillate capitula, 3-4-lobed pistillate receptacles, and penicillate stigma. The other new species, E. pachycephalum was discovered from Guangxi Zhuang Autonomous Region, and is related to E. fugongense W. T. Wang, differing from the latter in its thinner membranous adaxially strigose leaf blades, shorter petioles, longer terete and densely puberulous staminate penduncles, and the staminate involucres consisting of 1-seriate, not corniculate bracts. |
| Key words: Urticaceae, Elatostema, new species, China |
