Cyperus
cyperus, flatsedge
Specimens
Photos
Origin: Native
Conservation Status: Not of concern
Description:
[none provided]
Accepted Name:
Cyperus
Publication: Sp. Pl. 1: 44. 1753; Gen. Pl. ed. 5, 26. 1754.
Publication: Sp. Pl. 1: 44. 1753; Gen. Pl. ed. 5, 26. 1754.
Synonyms & Misapplications:
(none provided)
Species in Cyperus:
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Cyperus acuminatus – sharp-pointed flatsedge, taper-tip flatsedge
Occurring east of the Cascades crest and in the Columbia River Gorge in Washington; British Columbia to California, east across most of North America to the Atlantic Coast. -
Cyperus bipartitus – shining cyperus, shining flatsedge Occurring on both sides of the Cascades crest in Washington; Washington to California, east across most of the U.S. to eastern Canada and the Atlantic Coast.
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Cyperus diandrus – umbrella flatsedge Occurring east of the Cascades crest in southern Washington; native to central and eastern North America.
- Cyperus difformis – Asian flatsedge Occurring chiefly along the Columbia River in Washington; Washington to California, east along the southern U.S. border to eastern North America.
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Cyperus eragrostis – tall flatsedge Occurring west of the Cascades crest and in the Columbia River Gorge in Washington; British Columbia to California, also along the southern and eastern U.S. coast.
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Cyperus erythrorhizos – redroot flatsedge Occurring on both sides of the Cascades crest in and in the Columbia River Gorge in Washington; southern British Columbia to California, east across much of North America to the Atlantic Coast.
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Cyperus esculentus – yellow nut-grass Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
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var. leptostachyus – yellow nutgrass Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
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Cyperus fuscus – brown flatsedge, brown galingale Occurring on both sides of the Cascades crest in Washington; southern Washington to California, east to Nevada; also in eastern North America.
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Cyperus lupulinus – Great Plains flatsedge Occurring east of the Cascades crest in southeastern Washington; disjunct in southeastern Washington and adjacent Oregon and Idaho, otherwise from U.S. Great Plains to eastern Canada and Atlantic Coast.
- ssp. lupulinus – Great Plains flatsedge Occurring east of the Cascades crest in southeastern Washington; disjunct in southeastern Washington and adjacent Oregon and Idaho, otherwise from U.S. Great Plains to eastern Canada and Atlantic Coast.
- Cyperus odoratus – scented flatsedge
- Cyperus schweinitzii – sand flatsedge Occurring chiefly east of the Cascades crest in Washington; Washington to the Rocky Mountains, Great Plains, Great Lakes region, and northeastern North America.
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Cyperus squarrosus – awned flatsedge Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the Atlantic Coast.
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Cyperus strigosus – false flatsedge, straw-colored flatsedge Occurring chiefly east of the Cascades crest and along the Columbia River in Washington; Washington to California, east across most of North America to the Atlantic Coast.
Additional Resources:
PNW Herbaria: Specimen records of Cyperus in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Cyperus checklist entry
OregonFlora: Cyperus information
E-Flora BC: Cyperus atlas page
CalPhotos: Cyperus photos
165 photographs:
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