Monographs Details: Carex pennsylvanica Lam.
Authority: Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Description:Species Description - Stems (1–)2–5 dm, tufted in small to large, basally fibrillose clumps and also with long rhizomes; lvs 1–3 mm wide, shorter than the stems in tall plants; staminate spike terminal, 1–2.5 cm; pistillate spikes 1–3, sessile or short-pedunculate and loosely ascending, borne fairly close to each other and to the staminate spike, but not closely crowded, typically short-oblong, to ca 1.5 cm; lowest bract 1–3 cm, ± leafy, surpassed by the staminate spike; pistillate scales castaneous to stramineous, longer or shorter than the perigynia; perigynia 2.6–4.5 mm, short-hairy, 2-keeled and with several evident to obscure facial nerves, the body subglobose above the contracted base, abruptly prolonged into the sharply bidentate beak 0.2–1 mm; achene rounded-trigonous. N.Y. and s. Me. to Va. (and in the mts. to N.C. and Tenn.), w. to s. Sask., B.C., Wash., Calif., Oreg., and N.M. Two vars. with us, a third on the Pacific coast.