HABIT Perennial. Rhizomes elongated. Culms 15-80 cm long. Ligule an eciliate membrane. INFLORESCENCE Inflorescence a panicle. Panicle open. Spikelets solitary. Fertile spikelets pedicelled. Pedicels linear, or oblong. FERTILE SPIKELETS Spikelets comprising 2-6 fertile florets; without rhachilla extension, or with diminished florets at the apex. Spikelets oblong, or ovate; laterally compressed; 2.5-7 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose. GLUMES Glumes persistent; shorter than spikelet. Lower glume ovate; 0.75 length of upper glume; membranous; 1-keeled; 1-3 -veined. Lower glume apex acute. Upper glume ovate; 0.9-1 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acute. FLORETS Fertile lemma oblong; membranous; much thinner above; keeled; 3 -veined. Lemma lateral veins obscure; less than two thirds length of lemma. Lemma apex erose; acute. Palea 0.75 length of lemma; 2 -veined. Apical sterile florets resembling fertile though underdeveloped. FLOWER Anthers 3. FRUIT Caryopsis with adherent pericarp. Hilum elliptic. DISTRIBUTION Europe, or Temperate Asia, or North America.