The Ojos Negros Research Group


CharacteristicsYellow nutsedgePurple nutsedge
1. Scientific nameCyperus esculentus L.Cyperus rotundus L.
2. Common namesChufa, coquillo, yellow nutgrass, Northern nutgrass, nutsedge, earth almond, groundnut, tigernut, zulu nut, rush nut, duck potato, edible rushNutgrass, cocograss, mustaka, musta, motha, coquillo
3. Life cycle PerennialPerennial
4. Growth habit GraminoidGraminoid
5. Basal leavesThree rankedThree ranked
6. LeavesFlat, slightly corrugated, usually as long or longer than flowering stemFlat, slightly corrugated, usually shorter than flowering stem
7. Leaf colorLight greenDark green
8. Leaf width4-9 mm3-6 mm
9. Leaf tip Abruptly tapered, very pointed, pinched togetherLong attenuated, keeled
10. Flowering stemTriangularTriangular
11. Stem heightUp to 0.9 mUp to 0.4 m
12. Flower colorYellowish-brown, gold-brown or straw colorPurple to reddish brown
13. Flower size5-30 mm long, about 2-3 mm wide8-25 mm long, about 1-2 mm wide
14. TubersRound, unevenly globe-shaped, 0.3-1.5 cm in diameter, brown to black, hard, hairless, smooth (scales shed with maturity), with buds only at apex, formed at ends of whitish rhizomes Irregularly shaped, oblong to nearly round, up to 2.5 cm long, usually less than 1 cm thick, covered with persistent reddish or reddish brown papery scales or hairs, with buds scattered on the surface, tubers in chains, wiry rhizomes
15. Tuber tastesweet, almond-likebitter
16. RhizomesTerminate with a tuber, break easily; not connected among plantsDevelop chains of up to 15 tubers at intervals of 5-25 cm along their length; interconnected among plants
17. Uses of plantsWetland restoration, mitigation, and erosion control Carminative and energy and hormone regulating herb in traditional Chinese medicine; landscaping in China
18. Uses of tubersEdible, earthy-almond flavorMedicinally in China and India; tuber extracts may reduce nausea and act as a muscle relaxant
19. ReproducesPrimarily by tubersPrimarily by tubers
20. ClimateTemperate to tropicalTropical to warm
21. HabitatDisturbed soils, wide range of soil types; margins of lakes, rivers, streams, and marshes; riparian Disturbed soils, moist fertile soil, full sun
22. U.S. distributionAll states, excluding Wyoming, Montana, and Alaska, and including Hawaii and Puerto RicoAll Southern states, most Southwestern states, a few other northern states, plus Hawaii and Puerto Rico


purple nutsedge

General Yellow Nutsedge Purple Nutsedge Sustainable Control Strategies

Strategies for the Ojos Negros Valley Summary Coquillo Facts