yellow nutsedge
Cyperus esculentus L.
Description from Invasive.org
- Appearance
- Cyperus esculentus is a native perennial, with upright, triangular stems up to 2 ft. (0.61 m) tall and short, scaly rhizomes.
- Foliage
- Leaves are light green, very glossy and grass-like. They are three ranked and taper to a sharp point.
- Flowers
- The inflorescence is a terminal clustered spikelet. Flowers are yellowish to brownish in color.
- Fruit
- The fruits are achenes that seldom mature. Fruits are brown, sessile, and ellipsoid.
- Ecological Threat
- Cyperus esculentus is widespread and varies morphologically. Four varieties are recognized. It can be aggressive, with the tubers persisting even when the plant is pulled up by the roots. Cyperus esculentus can form dense stands especially in disturbed wetlands.
Selected Images from Invasive.org
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Flower(s)
Charles T. Bryson, USDA Agricultural Research Service, Bugwood.org
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Charles T. Bryson, USDA Agricultural Research Service, Bugwood.org
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Flower(s)
Charles T. Bryson, USDA Agricultural Research Service, Bugwood.org
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Charles T. Bryson, USDA Agricultural Research Service, Bugwood.org
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Flower(s) October. Photo from Forest Plants of the Southeast and Their Wildlife Uses by J.H. Miller and K.V. Miller, published by The University of Georgia Press in cooperation with the Southern Weed Science Society.
John W. Everest, Auburn University, Bugwood.org
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John W. Everest, Auburn University, Bugwood.org
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Stem(s) Triangular stem
Joseph LaForest, University of Georgia, Bugwood.org
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Joseph LaForest, University of Georgia, Bugwood.org
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Seed(s)
Ken Chamberlain, The Ohio State University, Bugwood.org
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Ken Chamberlain, The Ohio State University, Bugwood.org
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Feature(s) Tubers
Ken Chamberlain, The Ohio State University, Bugwood.org
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Ken Chamberlain, The Ohio State University, Bugwood.org
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Field Overview of mature ellow nutsedge (Cyperus esculentus) plants growing in an onion field.
Howard F. Schwartz, Colorado State University, Bugwood.org
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Howard F. Schwartz, Colorado State University, Bugwood.org
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