Helictotrichon Besser ex Schult. & Schult. f., Mantissa Addit. I. ad Mant. Cl. III:. 526 ("326"). 1827.
異燕麥屬
Perennial. Panicle usually narrow and erect, sometimes lax, rarely simple and raceme-likle. Spikelets with 2-serveral fertile florets plus 1-2 reduced florets, disarticulating above glumes and usually also between florets, the rhachilla pilose; glumes unequal the upper usually shorter than spikelet and often shorter than lemma, hyaline to meembrnous, 1-5-nerved with scaberulous keel; lemmas firmly membranous to coriaceous, rounded or weakly keeled, glabrous, bidentate, rarely 4-dentate or bisetulate, dorsally awned from above the middle, the awn usually geniculate, rarely recurved or straight; palea enclosed by lemma. Ovary hairy; hilum linear; endosperm sometimes liquid.
Mainly temperate Eurasia, but extending across the tropical mountains to temperate regions throughout the world.
Species ± 100. Dry hillsides; medaows and wood margins.
LITERATURE
Sevenster, J. G. and Veldkamp, J. F. 1983. A revision of Helictotrichon (Gramineae) in Malesia.
