Oryzopsis hymenoides (Roem. & Schult.) Ricker

  • 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

    Oryzopsis hymenoides (Roem. & Schult.) Ricker

  • Description

    Species Description - Densely tufted, 3–7 dm; ligules 2.5–7.5 mm, acuminate, becoming lacerate; blades numerous, smooth, strongly involute, ca 1 mm wide, nearly as long as the stems; panicle (5–)7–15(–19) cm, open, diffusely branched, with long-pedicellate spikelets; glumes ovate-acuminate or tapering to an awn to 2 mm, hyaline-margined, finely puberulent to subglabrous, the 3(5) nerves prominent toward the greenish glume-base, obscure in the anthocyanic distal part; first glume (4.5–)5–7.5(–8) mm, the second a bit shorter; lemma 2.5–4(–5), fusiform, turgid, maturing dark and shiny, densely white-pilose with long soft hairs ca = glumes; awn 3–5.5 mm, straight, readily deciduous; 2n=28, 48, 65, 130. Dry, open often very sandy places; Man. and nw. Minn. to B.C., s. to Calif. and Tex. (Achnatherum h.) Hybridizes with several spp. of Stipa, producing sterile plants called ×Stiporyzopsis bloomeri (Bol.) B. L. Johnson.

  • Common Names

    Indian ricegrass