Sparganium emersum Rehmann

  • 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

    Sparganium emersum Rehmann

  • Description

    Species Description - Much like no. 5 [Sparganium angustifolium Michx.], but with broader (6–12 mm), flat, more coarsely veined lvs, the basal ones ± V-shaped in section below; bracts and upper lvs not dilated at base except by the scarious margins; pistillate heads 1.5–2(–2.5) cm thick when ripe; 2n=30. In quiet water; circumboreal at high latitudes, s. to N. Engl., N.Y., Man., Colo., and Calif. Our plants, and most others from the conterminous U.S. and s. Can., belong to var. multipedunculatum (Morong) Reveal. (S. multipedunculatum) The more boreal and Eurasian var. emersum is more emergent, with larger heads and more keeled basal lvs. (S. simplex)