扎曲鹅观草——青海禾本科一新种

Roegneria zaquensis——A New Species of the Family Gramineae from Qinghai,China

对青海禾本科一新种——扎曲鹅观草（Roegneria zaquensis Y.H.Wu et S.L.Lu）进行了形态描述和图解。该种与玉树鹅观草（R.yushuensisL.B.Cai）相近,但本种的叶鞘顶端两侧具叶耳,穗状花序灰绿色,长10～15 cm,基部被顶生叶鞘所包;颖稍短,第一颖长2～3 mm,第二颖长4～5 mm;外稃背部无毛,芒长15～30 mm,第一外稃长10～12 mm;花药黄色或带绿色,长2～2.5 mm,可以区别。

Roegneria zaquensis Y.H.Wu et S.L.Lu,a new species of Gramineae from Zadoi County,Qinghai Province,is described and illustrated.The new species is related to Roegneria yushuensis L.B.Cai.However,it has auricles on top at the both sides of sheath.The spike is grey green,10～15 cm long,the base of spike was wrapped up by the sheath.The glume is shorter,the first one 2～3 mm long and the second one 4～5 mm long.The lemmas without hairs on the bake has an awn at the top 15～30 mm long,the first lemma is 10～12 mm long.The anthers is yellow with green and 2～2.5 mm long.