Glabrous perennial 1-2 m; lvs triangular in outline, the basal lobes, if developed, divergent, the terminal lobe long-acuminate, 2-6 times as long as the body of the lf; bractlets tapering to a filiform point; pet pink with darker center, 6-8 cm; seeds pubescent; 2n=38. Marshes and shallow water, on or near the coastal plain; s. Pa. to Fla. and Tex., and n. in the interior to O. and Minn. Aug.-Sept. (H. militaris)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.