Houghton's Flatsedge

Herbs, perennial, cespitose, bases cormose, rhizomatous. Culms trigonous, 5–50 cm × 0.5–1.5 mm, glabrous. Leaves V-shaped, 12–30 cm × 1–6 mm. Inflorescences: spikes ± globose to broadly ovoid, 8–20 mm wide; rays 1–8 cm; rachis 2–5 mm, glabrous; bracts 3–8, weakly ascending, flat, 3–20 cm × 1–3.5 mm; rachilla deciduous, wingless. Spikelets 3–18, compressed, ovoid to oblong-lanceoloid, 4–15 × 2.6–3.4 mm; floral scales deciduous, 3–18, laterally stramineous to reddish brown, laterally 3–4-ribbed, broadly ovate, 1.8–2.5 × 1.3–1.6 mm, apex with mucro 0.1–0.2 mm. Flowers: anthers 0.5–0.7 mm; styles 0.4–0.6 mm; stigmas 1–1.5 mm. Achenes dark brown, sessile, broadly ellipsoid, 1.5–2 × 1–1.5 mm, apex obtuse, apiculate, surface glabrous, puncticulate, or papillose. 2n = 168, 170, 172.

Man., Ont., Que.; Ill., Ind., Maine, Md., Mass., Mich., Minn., N.H., N.J., N.Y., Ohio, Pa., Vt., Va., W.Va., Wis.

Fruiting summer.

Riverbanks, sand bars, lakeshores, sand dunes, sandy openings in woods, especially among Jack pines; 0–1100m.

Cyperus houghtonii, commonly known as Houghton's flatsedge, is a species of sedge that is native to parts of North America.

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

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