Page authors: Don Knoke, David Giblin
Agrostis stolonifera
spreading bentgrass

Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.

Habitat: Wet, disturbed areas that include streambanks, flooded fields, and ditches at low to moderate elevations.

Flowers: June-September

Origin: Introduced from Eurasia

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Wind


Stoloniferous perennial, also sometimes rhizomatous, the culms erect to decumbent, 5-8 dm. tall.


Sheaths open; ligules truncate to obtuse, 3-6 mm. long, usually lacerate; blades flat or folded, 4-10 mm. broad.


Inflorescence a compressed to somewhat open panicle 5-30 cm. long, usually purplish, bearing spikelets nearly to the base; spikelets 1-flowered, articulate above the glumes; glumes subequal, 2-2.5 mm. long, acute; lemmas 2/3 to 3/4 as long as the glumes, scabrous on the keel, awnless; palea over 1/2 as long as the lemma; lodicules 2, 0.4 mm. long.

Accepted Name:
Agrostis stolonifera L.
Publication: Sp. Pl. 1: 62. 1753. 1753.

Synonyms & Misapplications:
Agrostis alba L. var. palustris (Huds.) Pers. [HC]
Agrostis alba L. var. stolonifera (L.) Sm. [HC]
Agrostis maritima Lam.
Agrostis palustris Huds.
Agrostis stolonifera L. var. compacta Hartm.
Agrostis stolonifera L. var. palustris (Huds.) Farw.
Additional Resources:

PNW Herbaria: Specimen records of Agrostis stolonifera in the Consortium of Pacific Northwest Herbaria database

WA Flora Checklist: Agrostis stolonifera checklist entry

OregonFlora: Agrostis stolonifera information

E-Flora BC: Agrostis stolonifera atlas page

CalPhotos: Agrostis stolonifera photos

28 photographs:
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