Schoenoplectus acutus (Muhlenberg ex Bigelow) Á. Löve & D. Löve var. acutus . Hardstem Bulrush, Great Bulrush. Phen: Jun-early Aug; Aug-Oct. Hab: Freshwater tidal marshes, calcareous spring marshes. Dist: The species is widespread in temperate North America; var. acutus is restricted to e. North America.

Origin/Endemic status: Native

Synonymy: = Ar, FNA23, K1, K3, K4, NE, NY, Pa, Va, Smith (1995); = Scirpus acutus Muhl. ex Willd. – C, F, G, GrPl, GW1, RAB, Tx, W, WV; < Schoenoplectus acutus (Muhl. ex Bigelow) Á.Löve & D.Löve – ETx1, Il, Mi, Mo1, NcTx; ? Schoenoplectus lacustris (L.) Palla ssp. glaucus (Sm.) Hartm.

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