Ceratophyllum demersum 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

    Ceratophyllum demersum L.

  • Description

    Species Description - Stems elongate, freely branched, forming large masses; lvs in whorls of 5–12, rather stiff, variable, 1–3 cm, mostly once or twice forked, the ultimate segments linear, flat, 0.5 mm wide, but nearly doubled in width at the broad, antrorse teeth; achene ellipsoid, 4–6 mm, with 2 basal spines; first 2 pairs of plumular lvs unbranched; 2n=24. Abundant in quiet water; widespread from s. Can. to S. Amer., and widely distributed in the Old World.