26eee. CAREX Linnaeus sect. SCIRPINAE (Tuckerman) Kükenthal in H. G. A. Engler, Pflanzenr. 20[IV,38]: 81. 1909.
Debra A. Dunlop
Carex [unranked] Scirpinae Tuckerman, Enum. Meth. Caric., 8. 1844; Scirpoideae Pax; Trysanolepis V. I. Kreczetowicz
Plants usually cespitose, short to long rhizomatous, sometimes inconspicuously rhizomatous. Culms red-brown at base. Leaves: basal sheaths fibrous or not, persistent sheaths usually absent; sheath fronts membranous, puberulent; blades V-shaped in cross section when young, glabrous or puberulent. Inflorescence usually 1 spike, rarely short second spike; bractless or bract filiform, sheathless, prophyllate; spikes unisexual, mostly staminate and pistillate spikes on different plants. Proximal pistillate scales with apex obtuse to acute, ciliate. Perigynia erect, veinless or obscurely veined, with 2 prominent marginal veins, stipitate, lanceolate to ovate or obovate, rounded-trigonous in cross section, less than 10 mm, base tapering or rounded, apex tapering or rounded to beak, pubescent; beak 0.1–0.5 mm, emarginate or shortly bidentate, teeth less than 0.8 mm. Stigmas (2–)3(–4). Achenes usually trigonous, smaller than bodies of perigynia; style deciduous. x = 29, 31.
Species 3 (3 in the flora): w and n North America, Europe (Norway), and Asia.
Dunlop, D. A. and G. E. Crow. (1999). The taxonomy of Carex section Scirpinae (Cyperaceae). Rhodora 101: 163–199.