178. Carex mitchelliana M. A. Curtis, Amer. J. Sci. Arts. 44: 84. 1843.
Carex crinita Lamarck var. mitchelliana (M. A. Curtis) Gleason
Plants cespitose. Culms acutely angled, 40–140 cm, scabrous. Leaves: basal sheaths brown; sheaths of proximal leaves bladeless, scabrous, fronts red-brown to copper-brown, spots absent, indistinctly ladder-fibrillose, apex U-shaped; blades hypostomic, 13–35 cm × 3–8 mm, papillose abaxially. Inflorescences: peduncle of proximal spike 0.6–3 cm; proximal bract longer than inflorescence, 1.5–6.2 mm wide. Spikes 2–4 pistillate, 1–2 staminate; pendent; proximal pistillate spike 3.1–7.9 cm × 3.6–7.4 mm. Pistillate scales pale to copper-brown; 2.9–6.3 mm (including awn), apex of body truncate, awned, scabrous. Perigynia ascending, pale brown, 1–5-veined abaxially or veinless, scarcely inflated, loosely enclosing achenes, ovoid, 2.5–3.9 × 1.3–2.1 mm, dull, apex acute, papillose over entire surface; beak 0.1–0.3 mm. Achenes not constricted. 2n = 66.
Fruiting Jun–Aug. Swamps, floodplain forests, wet meadows, stream edges, margins of lakes and ponds, roadside ditches; 0–500 m; Ala., Del., Fla., Ga., Ky., Md., Mass., Miss., N.J., N.Y., N.C., Pa., R.I., S.C., Tenn., Va.
No specimens are known from Connecticut; Carex mitchelliana may be expected to occur there. The species is known from fewer than 100 extinct and extant populations located predominantly along the Atlantic and Gulf coastal plains from Massachusetts to Alabama. Allozyme data demonstrated that the taxon, although not common, is genetically diverse and is closely related to the progenitor of the species complex (L. P. Bruederle et al. 1989).
Bruederle, L. P., D. E. Fairbrothers, and S. L. Hanks. 1989. A systematic circumscription of Carex mitchelliana (Cyperaceae) with reference to taxonomic status. Amer. J. Bot. 76: 124–132.