重庆赤车属一新种和楼梯草属二新种（英文）  

One New Species of Pellionia and Two New Species of Elatostema(Urticaceae) from Chongqing

作　　者：王文采[1] 

机构地区：[1]中国科学院植物研究所系统与进化植物学国家重点实验室,北京100093

出　　处：《植物研究》2017年第5期641-644,共4页Bulletin of Botanical Research

摘　　要：描述了自重庆市江津区四面山发现的荨麻科赤车属一新种和楼梯草属二新种:(1)四面山赤车,与融安赤车近缘,区别在于新种的叶的二级脉较少,2枚雌花被片有短角状突起,以及长圆形瘦果;(2)稀柱毛楼梯草,可能与托叶楼梯草近缘,区别在于新种的叶较小,雌总苞苞片,以及雄、雌小苞片均在背面具龙骨状突起,柱头由只3~4根毛组成;(3)四面山楼梯草,与长尖楼梯草近缘,区别在于新种茎的顶端被短柔毛,雄头状花序的花序梗较短,以及雄总苞苞片呈条状船形,背面具龙骨状突起。One species of the genus Pellionia and two species of the genus Elatostema（Urticaceae） are described as new from Simian Shan,Jiangjin Qu,Chongqing Shi：（1） Pellionia simianshanica is related to P. ronganensis W. T. Wang Y. G. Wei,differing from the latter in its fewer secondary nerves of leaves,2shortly corniculate tepals of pistillate flower,and its oblong achenes;（2） Elatostema oligotrichum is possibly related to E. nasutum Hook. f.,differing from the latter in its smoller leaves,carinate pistillate involucral bracts and staminate and pistillate bracteols,and its stigma consisting of only 3 or 4 hairs;（3） Elatostema simianshanicum is related to E. longicuspe W. T. Wang Y. G. Wei,differing from the latter in its puberulous stem apex,shorter peduncles of staminate capitula,and its linear-navicular and carinate staminate involucral bracts.

关 键 词：荨麻科 赤车属 楼梯草属 新种 重庆 

分 类 号：Q949.737.5[生物学—植物学]