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植物研究 ›› 2006, Vol. 26 ›› Issue (6): 641-643.doi: 10.7525/j.issn.1673-5102.2006.06.001

• 论文 •    下一篇

榆属(榆科)一新种——绵竹榆

易同培;杨 林   

  1. (四川农业大学都江堰分校,都江堰 611830)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2006-11-20 发布日期:2006-11-20
  • 通讯作者: 易同培
  • 基金资助:
     

Ulmus mianzhuensis, a new species of Ulmaceae from Sichuan,China

YI Tong-Pei;YANG Lin   

  1. (Dujiangyan Campus,Sichuan Agricultural University,Dujiangyan 611830)
  • Received:1900-01-01 Revised:1900-01-01 Online:2006-11-20 Published:2006-11-20
  • Contact: YI Tong-Pei
  • Supported by:
     

摘要: 绵竹榆的花秋季开放,翅果柱头面被毛,其两侧的翅较果核为窄,果核位于翅果上端接近缺口处,与榔榆(Ulmus parvifolia Jacq.)相似,但树皮深灰色,不规则鳞块状浅裂,叶片先端渐尖,花被片裂至基部,宿存,边缘上部生纤毛,翅果狭椭圆形,中部最宽,向两端渐变窄,果梗与花被等长,长约2 mm,果序梗长约1 mm,而明显不同。

关键词: 榆属, 绵竹榆, 新种, 四川, 中国

Abstract: Ulmus mianzhuensis Yi et L. Yang, a new species of Ulmaceae from Sichuan,China, is described and illustrated. The new species is similar to U. parvifolia Jacq. in having pale pubescent at stigma of samara,the lateral wing of samara more narrow than stone,the stone sits at samara near emarginate of the top, but differs by having darkgrey and irregularly squamosely shallowly dehiscing bark, lamina acuminate in top, perianth splitting to base and persisting, margin upwards ciliolate, samara narrow elliptic, center broadest, with pedicel equalling the perianth (about 2 mm long), peduncle about 1 mm long.

Key words: Ulmus, U. mianzhuensis Yi et L. Yang, new species, Sichuan, China

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