Sparganium hyperboreum Laest.

  • 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 hyperboreum Laest. ex Beurl.

  • Description

    Species Description - Stems floating, or decumbent and ascending, very slender; lvs thick, flat, 1–4 mm wide, much elongate when floating; pistillate heads 2–4, the lower 1 or 2 supra-axillary, sometimes short-peduncled, 1 cm thick when ripe; tep narrowly spatulate, scarcely reaching the middle of the fr; achenes sessile or nearly so, dark yellow, the body ellipsoid, 4 mm, scarcely constricted, acute at both ends, tipped with the persistent, dark, papilliform stigma less than 0.5 mm; staminate head 1, closely adjacent to the pistillate; anthers oblong, 0.4–0.8 mm; 2n=30. Cold quiet water; circumboreal, s. to N.S.