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植物研究 ›› 2016, Vol. 36 ›› Issue (6): 801-804.doi: 10.7525/j.issn.1673-5102.2016.06.001

• 论文 •    下一篇

算盘楼梯草与密枝楼梯草绝非同种

王文采   

  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
  • 收稿日期:2016-03-30 出版日期:2016-11-15 发布日期:2016-11-16
  • 作者简介:王文采(1926-),男,研究员,中国科学院院士,从事有花植物分类学研究。

Elatostema glochidioides is Decidedly Unconspecific with E.famosissimum

WANG Wen-Tsai   

  1. State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Scienses, Beijing 100093
  • Received:2016-03-30 Online:2016-11-15 Published:2016-11-16

摘要: 在2011年,特产我国南部的算盘楼梯草(Elatostema glochidioides W.T.Wang)被归并于特产大洋洲萨瓦伊岛的密枝楼梯草(E.ramosissimum Reinecke)。最近我研究了二种植物的标本,了解到二种虽在体态上甚为相似,但存在重要形态区别:在算盘楼梯草,叶上面被短糙伏毛,下面无毛,具三出脉,雌头状花序的花序托明显,雌花无花被片,瘦果具纵肋。在密枝楼梯草,叶上面无毛,下面中脉上被糙伏毛,具半离基三出脉,雌花有3(-4)花被片,瘦果有小瘤状突起。根据上述重要区别,本文将算盘楼梯草的种的身份以恢复。

关键词: 荨麻科, 算盘楼梯草, 密枝楼梯草, 种的身份的恢复

Abstract: In 2011, Elatostema glochidioides W. T. Wang, a species endemic to southern China, was reduced into the synonymy of E.ramosissimum Reinecke, a species endemic to Savaii Island of Oceania. Two species have rather similar habit, but there are important morphological differences. In E.glochidioides, the leaves are adaxially strigose, abaxially glabrous, and trinerved; the pistillate capitula have conspicuous receptacles; the pistillate flower lacks tepals; and the achenes are longitudinally ribbed. In E.ramosissimum, the leaves are adaxially glabrous, abaxially on midrib strigose, and semi-triplinerved; the receptacles of pistillate capitula are very small, inconspicuous; the pistillate flower has 3(-4) tepals; and the achenes are minutely tuberculate. On the basis of the morphological differences just mentioned the specific status of E.glochidioides is restored here.

Key words: Urticaceae, Elatostema glochidioides W.T.Wang, Elatostema ramosissimum Reinecke, restoration of specific status

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