Cyperus croceus Vahl

Cyperus globulosus Aublet is a synonym of C. luzulae (Linnaeus) Rottbøll ex Retzius, which is a widespread neotropical species, and it has long been misapplied to Cyperus croceus (G. C. Tucker 1987).

Herbs perennial, cespitose. Culms trigonous, (4–)14–45 cm × 1–2 mm, glabrous. Leaves yellow-green, flat, 18–44 cm × 3–4.5 mm. Inflorescences: spikes densely to loosely globose to ovoid, 10–20 mm wide; rays (3–)5–9(–14), 1–15(–26) cm; rachis 3–6(–9) mm; bracts (4–)6–9(–11), horizontal to ascending at 45°, flat, 1–30 cm × 0.5–4 mm; rachilla deciduous, wings persistent, 0.3–0.5(–0.8) mm wide. Spikelets (10–)30–50, oblong to lanceoloid, quadrangular to subterete, compressed, 4–8 × 1–1.3 mm; distal spikelet spreading or ascending; floral scales persistent, (1–)2–4(–6), appressed, whitish with red speckles, laterally 2–4-ribbed, ovate, 2.3–3.6 × 1.8–2.2 mm. Flowers: anthers 0.5 mm; styles 0.6–1.3 mm; stigmas 1.2–2.6 mm. Achenes reddish brown to nearly black, sessile, oblong, ellipsoid, 2–2.4 × 0.4–0.5(–0.7) mm, apex ± truncate-emarginate, apiculate, surfaces puncticulate.

Ala., Ark., Del., Fla., Ga., La., Md., Miss., Mo., N.J., N.C., Okla., Pa., S.C., Tenn., Tex., Va., W.Va.; Mexico; West Indies; Central America; South America (Venezuela).

Fruiting summer–early fall.

Disturbed, sunny areas, coastal rocks, moist thickets; 0–200m.

Cyperus baldwinii Torrey; C. cyclostachyus Grisebach; C. echinatus (Linnaeus) Alph. Wood var. multiflora Chapman; C. globulosus Aublet var. pseudofiliculmis Kükenthal; C. globulosus var. robustus (Boeckeler) Shinners; C. plankii Brittton; C. retrorsus Chapman var. robustus Kükenthal; Mariscus bracheilema Steudel; M. brittonii C. B. Clarke

Cyperus croceus, commonly known as Baldwin's flatsedge, is a species of sedge that is native to parts of North America, Central America, and South America.

The species was first formally described by the botanist Martin Vahl in 1805.

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

Cyperus croceus là một loài thực vật có hoa trong họ Cói. Loài này được Vahl mô tả khoa học đầu tiên năm 1805.