Potamogeton perfoliatus L.

  • 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

    Potamogeton perfoliatus L.

  • Description

    Species Description - Stem slender, to 2.5 mm, often much branched; internodes mostly 1–3 cm; lvs all submersed, ovate to suborbicular, 1–5(–9) cm × 5–25(–40) mm, mostly broadly rounded or obtuse, sessile, with cordate-clasping, often perfoliate base, delicately 3–25-veined, 3(5) veins stronger; stipules axillary, free, evanescent; peduncles 1–7 cm, about as thick as the stem, not clavate; spikes dense, cylindric, 1–4.5 cm; frs obliquely obovoid, 1.6–3 mm (including the short beak), very shallowly pitted, with 3 obscure dorsal keels, or keelless; 2n=52. Ponds and slow streams; irregularly cosmopolitan, in Amer. from Nf. and Ont. to N.C. and O., disjunct along the Gulf Coast.

  • Common Names

    redhead-grass, perfoliate pondweed