Two new species of Leymus (Poaceae : Triticeae) from Qinghai, China

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	Two new species of Leymus (Poaceae : Triticeae) from Qinghai, China
	Cai, LB
	2000-03-01
发表期刊	NOVON
卷号	10 期号:1 页码:7-11
文章类型	Article
摘要	Two new species of Leymus, L. pendulus and L. obvipodus, are described and illustrated. These two species are endemic to Qinghai province, China, occurring at the margins of woodlands, wastelands, mountain valleys, and the bases of walls, at 2280-2400 m elevation. Leymus pendulus is unusual in its lax, long, pendent spikes. It is closely related to L. flexus, but differs from that species by pendent spikes, longer rachis internodes, and shorter glumes and lemmas. Leymus obvipodus is unique in the genus in having all spikelets pedicellate. It resembles both L. divaricatus (Drobow) Tzvelev and L. aristiglumus L. B. Cai but differs from the former by lanceolate glumes with 1 to 3 nerves, longer spike-like panicles, taller culms, and lanceolate lemmas with 5 obscure nerves and pubescent margins, and from the latter by lax, longer spike-like panicles, pedicellate spikelets with 4 to 8 florets, narrower glumes, and longer, lustrous lemmas.; Two new species of Leymus, L. pendulus and L. obvipodus, are described and illustrated. These two species are endemic to Qinghai province, China, occurring at the margins of woodlands, wastelands, mountain valleys, and the bases of walls, at 2280-2400 m elevation. Leymus pendulus is unusual in its lax, long, pendent spikes. It is closely related to L. flexus, but differs from that species by pendent spikes, longer rachis internodes, and shorter glumes and lemmas. Leymus obvipodus is unique in the genus in having all spikelets pedicellate. It resembles both L. divaricatus (Drobow) Tzvelev and L. aristiglumus L. B. Cai but differs from the former by lanceolate glumes with 1 to 3 nerves, longer spike-like panicles, taller culms, and lanceolate lemmas with 5 obscure nerves and pubescent margins, and from the latter by lax, longer spike-like panicles, pedicellate spikelets with 4 to 8 florets, narrower glumes, and longer, lustrous lemmas.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
学科领域	植物学
收录类别	SCI
语种	英语
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
WOS记录号	WOS:000086608400003
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/1436
专题	中国科学院西北高原生物研究所
作者单位	Chinese Acad Sci, NW Plateau Inst Biol, Xining 810001, Qinghai, Peoples R China
推荐引用方式 GB/T 7714	Cai, LB. Two new species of Leymus (Poaceae : Triticeae) from Qinghai, China[J]. NOVON,2000,10(1):7-11.
APA	Cai, LB.(2000).Two new species of Leymus (Poaceae : Triticeae) from Qinghai, China.NOVON,10(1),7-11.
MLA	Cai, LB."Two new species of Leymus (Poaceae : Triticeae) from Qinghai, China".NOVON 10.1(2000):7-11.

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