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

NWIPB OpenIR

	Two new species of Leymus (Poaceae : Triticeae) from Qinghai, China
	Cai, LB
	2000-03-01
发表期刊	NOVON ; Cai LB.Two new species of Leymus (Poaceae : Triticeae) from Qinghai, China. NOVON,2000,10(1):7-11
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.
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/50911
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Cai, LB. Two new species of Leymus (Poaceae : Triticeae) from Qinghai, China[J]. NOVON, Cai LB.Two new species of Leymus (Poaceae : Triticeae) from Qinghai, China. NOVON,2000,10(1):7-11,2000.
APA	Cai, LB.(2000).Two new species of Leymus (Poaceae : Triticeae) from Qinghai, China.NOVON.
MLA	Cai, LB."Two new species of Leymus (Poaceae : Triticeae) from Qinghai, China".NOVON (2000).