• Authority

    Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

  • Family


  • Scientific Name


  • Description

    Genus Description - Spikelets 2–many-fld, slightly to strongly flattened, disarticulating above the glumes and between the lemmas, or eventually fragmenting irregularly, or the lemmas individually deciduous from the persistent rachilla (the grain falling free); glumes 1-veined or the second one 3-veined, usually unequal; lemma 3-veined (the lateral veins sometimes obscure), awnless, blunt to acute or short-acuminate, ± keeled but varying from V- shaped in cross-section to rounded on the back; palea somewhat shorter than the lemma, often ciliate on the 2 keels; grain short-cylindric to subglobose, ovoid, or pyriform; ligule a band of short hairs; sheaths almost always pilose or hirsute at the top; panicle open and ± diffusely branched, varying to dense and subglobose to cylindric or spike-like; only 2 of our spp. have anthers more than ca 0.5 mm. 250, cosmop.

  • Common Names