Eleocharis mutata (L.) Roem. & Schult.

Eleocharis mutata (L.) R. & S. Syst. Veg 2:155. 1817.
Scirpus mutatus L. Plant. Jam. Pug. 6. 1759. Limnochloa mutata Nees, Linnaea 9: 294. 1834.
Culms sharply triangular, coarse, 4-10 dm. high, from a short caudex; roots very numerous, fibrous, gray or brown ; sheaths straw-colored or light brown, membranous, pointed at the summit, often elongated; spikelets 1.5-5 cm. long, cylindric, usually obtuse; scales many-ranked, straw-colored, thin, orbicular to obovate, with broad membranous sides and an erose upper margin, often slightly keeled, frequently not appressed to the rachis ; style trifid; stamens 3; achene 1.7-2.3 mm. long (including the style-base), elliptic or obovate, shining, rather smooth, yellow to brown, with about 24 rows of shallow, transversely linear cells with their margins often slightly raised, surmounted at the summit by an angular thickening which merges gradually into the short style-base ; bristles 6, irregular, equaling the achene, lustrous-brown, with coarse but soft teeth. Type locality: Jamaica (Browne).
Distribution: West Indies; Mexico; British Honduras; Panama; tropical South America; tropical Africa.

Eleocharis mutata là loài thực vật có hoa trong họ Cói. Loài này được (L.) Roem. & Schult. mô tả khoa học đầu tiên năm 1817.