青海赖草属一新种  

A new species of Leymus Hochst.from Qinghai, China

作　　者：智丽[1] 蔡联炳[2] 

机构地区：[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

出　　处：《植物研究》2006年第2期129-130,共2页Bulletin of Botanical Research

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60～90cm。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10～15cm，宽5～15mm，穗轴粗糙，小穗常3～4枚生于每节，含3～6小花；颖披针形，长4～7mm，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4～5mm。该种与L．paboahus相似。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 flavo-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.

关 键 词：赖草属 圆稃赖草 新种 青海 中国 

分 类 号：Q949.714.2[生物学—植物学] Q959.226