Fimbristylis annua (All.) Roem. & Schult.

  • 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

    Fimbristylis annua (All.) Roem. & Schult.

  • Description

    Species Description - Clustered annual to 3(–5) dm; lvs narrowly linear, 1–2(–4) mm wide, glabrous to tomentose; ligule a line of short hairs; spikelets 3–8 mm, lance-ovoid or oblong, few–many in a simple or compound system of umbelliform cymes; scales broadly oblong to ovate, smooth, only seldom shortly excurrent-mucronate; stamens 1 or 2; anthers 1 mm; style bifid, fimbriate from near the base to the branch-point; achene lenticular, plump, obovate, 1 mm, rather coarsely cellular-reticulate in vertical rows, sometimes warty; 2n=30. Moist, sunny, sometimes disturbed sites; widespread in trop. and warm-temp. regions, n. in U.S. to Del., Pa., and Mo. Often included in the mainly tropical, coarser perennial F. dichotoma (L.) Vahl.