Carex frankii Kunth
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Stems 2–8 dm, in small tufts on rather short rhizomes, aphyllopodic; lvs to 1 cm wide, the ligule shorter to somewhat longer than wide; terminal spike 0.5–3 cm, usually wholly staminate, rather short-peduncled, often concealed among the pistillate ones, or short-peduncled and exsert; pistillate spikes 3–6, usually approximate or crowded, sometimes separate or the lower remote, cylindric or elliptic, 1.5–3 × 1 cm, very dense, rounded at both ends, sessile or nearly so; bracts lf-like, 2–4 times as long as the infl at least the lower strongly sheathing; pistillate scales with concealed body and an exsert slender awn equaling or surpassing the perigynium-beaks; perigynia obconic, inflated, the body 2.2–3.6 mm, with 2 strong ribs and ca 10–18 fine sharp nerves, depressed-truncate above and very abruptly beaked, the beak 1.3–2.3 mm its teeth 0.5 mm; achene loosely enveloped, obovoid-trigonous, 1.5–2 mm, with a persistent straight style. Swamps and wet woods; Va. to w. N.Y., s. Ont., Mich., and se. Nebr., s. to Ga. and Tex.