Page author: Don Knoke
Cyperus strigosus
false flatsedge, straw-colored flatsedge

Distribution: Widespread in the United States and adjacent Canada.

Habitat: Wet places, along the banks of large streams, in the valleys and lowlands.

Flowers: July - September

Origin: Native

Conservation Status: Not of concern


Short-lived perennial without rhizomes, the sharply triangular, solitary or few solid stems 1-6 dm. tall.


Leaves several, grass-like, crowded at the base, 2-10 mm. wide, the sheaths closed.


Spikelets numerous, in short, cylindric spikes, spreading at right angles from the elongate rachis, 6-25 mm. long and 1-2 mm. wide; scales of the spikelets in two vertical rows, several nerved; axis of the spikelets with translucent wings that clasp the lower part of each achene; stamens 3; style trifid.


Achenes unequally triangular, 1.5-2 mm. long, 3-4 times as long as wide.

Accepted Name:
Cyperus strigosus L.
Publication: Sp. Pl. 1: 47. 1753. 1753.

Synonyms & Misapplications:
Cyperus hansenii Britton
Cyperus stenolepis Torr.
Cyperus strigosus L. var. hansenii (Britton) Kük.
Mariscus stenolepis (Torr.) C.B. Clarke
Mariscus strigosus (L.) C.B. Clarke
Additional Resources:

PNW Herbaria: Specimen records of Cyperus strigosus in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Cyperus strigosus checklist entry.

E-Flora BC: Cyperus strigosus atlas page.

CalPhotos: Cyperus strigosus photos.

USDA Plants: Cyperus strigosus information.

23 photographs:
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