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植物研究 ›› 2006, Vol. 26 ›› Issue (2): 129-130.doi: 10.7525/j.issn.1673-5102.2006.02.001

• 论文 •    下一篇

青海赖草属一新种

智 丽1;蔡联炳2   

  1. 1.西南农业大学园艺园林学院, 重庆 400716 2.中国科学院西北高原生物研究所, 西宁 810001
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2006-03-20 发布日期:2006-03-20
  • 通讯作者: 智 丽
  • 基金资助:
     

A new species of Leymus Hochst. from Qinghai, China

ZHI Li;CAI Lian-Bing   

  1. 1.College of horticulture Southwest Agricultural University, Chongqing 400716 2.Northwest Plateau Institute of Biology, the Chinese Academy of Sciences, Xining 810001
  • Received:1900-01-01 Revised:1900-01-01 Online:2006-03-20 Published:2006-03-20
  • Contact: ZHI Li
  • Supported by:
     

摘要: 报道了青海赖草属植物一新种:圆稃赖草(Leymus oblongolenmatus L. Zhi et L.B. Cai)。该种的主要特征如下:多年生草本,杆直立、光滑、疏丛,高60~90 cm。叶鞘粗糙,边缘膜质,长于或短于节间,叶舌膜质;叶片边缘内卷。穗状花序直立、密集、黄绿色,长10~15 cm,宽5~15 mm,穗轴粗糙,小穗常3~4枚生于每节,含3~6小花;颖披针形,长4~7 mm,具3~5脉,边缘膜质;外稃长圆状披针形,不明显3脉,背部疏生短柔毛;花药黄色,长4~5 mm。该种与L. paboahus相似。

关键词: 赖草属, 圆稃赖草, 新种, 青海, 中国

Abstract: A new species of Leymus in Qinghai, China is reported, and it’s called L. oblongolenmatus L. Zhi et L. B. Cai. The main characters are described as follows: Perennial herbs. Stems are erect and glabrous, few and scattered, 60~90 cm. tall. tough leaf-sheath, membranaceous on margins, longer or shorter than internodes, membranaceous ligules; Leaf blades involute on margins. Spikes are erect, conferted and flavor-green, 10~15 cm. long, 5~15 mm. wide. tough rachis, each node of rachis are with 3~4 spikelets, with 3~6 florets. Glumes lanceolate, 4~7 mm long and three to five-nerved, membranaceous on margins. Lemmas prolate spheroidal and lanceolate, obscurely three-nerved, with sparse short-pilose on the back. Anther flavescent, 4~5 mm. long. This species is similar to L. paboahus.

Key words: Leymus, L. oblongolemmatus, new species, Qinghai, China

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