Cyperus dentatus Torrey [var.] multiradiatus Torrey; C. multiradiatus (Torrey) C. Mohr

Herbs, perennial, cespitose, rhizomatous, with stolons, lacking tubers. Culms trigonous, 10–50 cm × 1–3 mm. Leaves flat to V-shaped, 10–40 cm × 2–5 mm. Inflorescences: heads digitate, 10–40 mm diam.; rays 5–12, 1–12 cm; 2d order rays 1–3 cm; bracts 3–5, horizontal, flat to V-shaped, 1–15 cm × 1–2 mm. Spikelets (1–)2–4(–6), oblong to linear, compressed, 5–25 × 2.8–3.6 mm; floral scales 20–60, stramineous or reddish green, laterally weakly 3-ribbed, ovate-elliptic, 2.5–3 × 1–1.8 mm. Flowers: stamens 3; anthers 1–1.3 mm; styles 0.6 mm; stigmas 1.5 mm. Achenes reddish brown, sessile, ovoid, 0.7–0.8 × 0.4–0.5 mm, apex obtuse, apiculate or not, surfaces glabrous.

Fruiting summer. Emergent shorelines; 0–100(–300) m; Ala., Fla., La., Miss., N.C., S.C.