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Perennial. Culms tall, basal internodes often swollen into globose corms. Leaf blades linear, flat. Inflorescence a moderately dense panicle. Spikelets weakly laterally compressed, florets 2, dimorphic, sometimes with an additional rudiment, lower floret staminate and strongly awned, upper floret bisexual and weakly awned or awnless; rachilla disarticulating above glumes but not between florets, extended beyond terminal floret; glumes unequal, thin, lower glume 1/2 spikelet length or more, 1-veined, upper glume as long as spikelet, 3-veined; lemmas firmly membranous to subleathery, rounded on back, 5–9-veined, apex 2-denticulate; lower lemma awned from near base, awn geniculate with twisted column, exserted from spikelet; upper lemma with a short straight awn or awnless; palea slightly shorter than lemma, keels ciliate. Ovary apex hairy; hilum linear.
Spikelets 2-fld, disarticulating above the glumes and between the lemmas; glumes unequal, chartaceous, hyaline in age, the first shorter, 1-veined, the second equaling the lemmas, 3-veined; lemmas thin, rounded on the back, short-bearded at base, 5–7-veined, the lower enclosing a staminate fl and bearing below the middle a long geniculate awn, the upper one enclosing a perfect fl and awnless or bearing just below the tip a much shorter straight awn; tall perennials with flat lvs and narrow panicles. 6, temp. Eurasia.
