Polygonum douglasii Greene

  • 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

    Polygonum douglasii Greene

  • Description

    Species Description - Slender annual, 2–6 dm, with numerous ascending branches; lvs linear-oblong to narrowly lanceolate, 2–5 cm × 2–8 mm, subulate-tipped, flat, often somewhat revolute; fls remote, only 1–3 per ocrea; pedicels 2–3 mm, exsert and soon reflexed; perianth 3–4 mm, cleft nearly to the base; achene black, shiny, 3–4 mm; 2n=40. Open, rocky or gravelly soil; Que. and n. N. Engl. to ne. Minn. and Io.; widespread in w. U.S.