Page authors: Don Knoke, David Giblin
Leersia oryzoides
rice cut grass

Distribution: Occurring on both sides of the Cascades in Washington; British Columbia east to the Atlantic Coast, south throughout the U.S.

Habitat: Wet places, often in fairly deep water.

Flowers: July-September

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern


Rhizomatous perennial, the culms 6-15 dm. tall.


Sheaths open, scabrous; ligules 1 mm. long, truncate; blades flat, 6-10 mm. broad, strongly scabrous on the margins, abruptly narrowed just above the base.


Inflorescence an open panicle 10-20 cm. long, often with reduced, axillary panicles in the upper sheaths; spikelets 1-flowered; glumes lacking; lemmas 5-nerved, leathery, 5 mm. long, bristly-pubescent; paleas equaling the lemmas; stamens 3

Accepted Name:
Leersia oryzoides (L.) Sw.
Publication: Prodr. 21. 1788.

Synonyms & Misapplications:
Homalocenchrus oryzoides (L.) Pollich
Phalaris oryzoides L.
Additional Resources:

PNW Herbaria: Specimen records of Leersia oryzoides in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Leersia oryzoides checklist entry.

E-Flora BC: Leersia oryzoides atlas page.

CalPhotos: Leersia oryzoides photos.

USDA Plants: Leersia oryzoides information.

21 photographs:
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