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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.

ID notes: Schoenoplectus acutus var. acutus is very robust, up to 3 m tall, the round stems arising from thick horizontal rhizomes. Near the top of the stem is an inflorescence with generally erect to arching branches. From the base of the inflorescence grows a bract which appears as if it is a continuation of the stem. It is very similar to S. tabernaemontani, but female scale awns are longer (0.5-2 mm vs. 0.2-0.8 mm) and usually bent (vs. usually straight in that species). The two species are known to hybridize and so some specimens may not key cleanly. The species is noted for its solid (hard) culms (stems), as the common name implies, as opposed to soft and easily compressed stems in some other similar species.

Origin/Endemic status: Native

Synonymy: = Ar, FNA23, K1, K3, K4, NE, NY, Va, Smith (1995); = n/a – Tat; = 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, Pa; ? Schoenoplectus lacustris (L.) Palla ssp. glaucus (Sm.) Hartm.

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: OBL (name change)
  • Eastern Mountains and Piedmont: OBL (name change)
  • Great Plains: OBL (name change)
  • Midwest: OBL (name change)
  • Northcentral & Northeast: OBL (name change)

Heliophily ?: 9

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image of plant© Scott Ward | Original Image ⭷
image of plant© Alex Graeff, some rights reserved (CC BY-NC-ND), uploaded by Alex Graeff source CC-BY-NC-ND, permission granted to NCBG | Original Image ⭷
image of plant© Scott Ward, Prominently red-dotted scales | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷
image of plant© Steven Daniel, all rights reserved, uploaded by Steven Daniel source | Original Image ⭷
image of plant© Scott Ward, some rights reserved (CC BY), uploaded by Scott Ward source CC-BY | Original Image ⭷
image of plant© Scott Ward, some rights reserved (CC BY), uploaded by Scott Ward source CC-BY | Original Image ⭷
image of plant© Scott Ward, some rights reserved (CC BY), uploaded by Scott Ward source CC-BY | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷
image of plant© Alex Graeff, some rights reserved (CC BY-NC-ND), uploaded by Alex Graeff source CC-BY-NC-ND, permission granted to NCBG | Original Image ⭷
image of plant© Alex Graeff, some rights reserved (CC BY-NC-ND), uploaded by Alex Graeff source CC-BY-NC-ND, permission granted to NCBG | Original Image ⭷
image of plant© Steven Daniel, all rights reserved, uploaded by Steven Daniel source | Original Image ⭷
image of plant© Radford, Ahles and Bell | Original Image ⭷

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