Cyperus setigerus Torr. & Hook.

Herbs, perennial, rhizomatous. Culms trigonous, 50–100 cm × 2.5–3 mm, glabrous. Leaves V-shaped, 20–50 cm × 4–7 mm. Inflorescences: spikes loosely ovoid, 1.5–7 cm wide; rays 5–13, 1–21 cm; 2d order rays 0.5–3 cm; bracts 3–8, V-shaped, 5–50 cm × 2.5–5.6 mm; rachilla persistent, wings 0.4–0.6 mm wide. Spikelets 5–30, compressed, linear, (5–)12–40 × 1.5–2.2 mm; floral scales deciduous, 6–24, reddish brown to yellowish brown laterally, greenish medially, 5–7-ribbed, elliptic, 3–4 × 1.4–1.6 mm, apex obtuse. Flowers: anthers 1.5–2 mm; styles 2–2.3 mm; stigmas 2–3 mm. Achenes dark brown, sessile, oblong, 1.5 × 0.4–0.5 mm, apex apiculate, surfaces puncticulate.

Kans., Mo., N.Mex., Okla., Tex.

Fruiting summer.

Ditches, croplands; 100–1000m.

Cyperus setiger is a species of sedge that is native to central and southern parts of the United States.

Cyperus setigerus adalah spesies tumbuhan yang tergolong ke dalam famili Cyperaceae. Spesies ini juga merupakan bagian dari ordo Poales. Spesies Cyperus setigerus sendiri merupakan bagian dari genus Cyperus. Nama ilmiah dari spesies ini pertama kali diterbitkan oleh Torr. & Hook..

Cyperus setigerus là loài thực vật có hoa trong họ Cói. Loài này được Torr. & Hook. mô tả khoa học đầu tiên năm 1836.