Sparganium americanum Nutt.

• Authority

  Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

• Family

  Typhaceae

• Scientific Name

  Sparganium americanum Nutt.

• Description

  Species Description - Stout, erect, 3–10 dm; lvs to 1 m, 4–12 mm wide, usually thin and flat, occasionally weakly carinate; bracts often dilated at base; infl simple or branched; pistillate heads on the central axis 2–4, on the branches 1–3, all sessile, 2 cm thick when ripe; stipe 2–3 mm; tep two-thirds as long as the fr, dilated at the tip; achene-body fusiform, dull, sordid brown, 3–5 mm, slightly constricted, the beak straight, 1.5–4.5 mm; staminate heads 1–5 on the branches, 3–10 on the main axis. Mud or shallow water of swamps and ponds; Nf. and Que. to Minn., s. to Fla. and La.