Page authors: Don Knoke, David Giblin
Agrostis exarata
spiked bent

Distribution: Widely distributed throughout Washington; Alaska south to California, east to Alberta, Nebraska and Texas.

Habitat: Moist areas, from near sea level to mid-elevations in the mountains.

Flowers: June-September

Origin: Native

Conservation Status: Not of concern


Tufted perennial, the culms 2-12 dm. tall, usually erect, but occasionally decumbent.


Sheaths open, smooth; ligules 3-8 mm. long, obtuse and lacerate; blades flat, scabrous, 2-10 mm. broad.


Inflorescence a congested to open panicle 5-25 cm. long, the branches ascending to erect, green to purplish, scabrous throughout; spikelets 1-flowered, articulate above the glume; glumes 2.5-4.5 mm. long, pointed, often with an awn or bristle tip, the second glume somewhat shorter than the first; lemma 1.5-2.5 mm. long, always shorter than the second glume, sometimes awned from above midlength; callus slightly bearded; palea 0.2-0.5 mm. long; lodicules 2, 0.3-0.5 mm. long



Accepted Name:
Agrostis exarata Trin.
Publication: Gram. Unifl. Sesquifl. 207 1824.

Synonyms & Misapplications:
Agrostis aenea (Trin.) Trin.
Agrostis alaskana Hultén
Agrostis ampla Hitchc.
Agrostis asperifolia Trin.
Agrostis exarata Trin. ssp. exarata [HC]
Agrostis exarata Trin. ssp. minor (Hook.) C.L. Hitchc. [HC]
Agrostis exarata Trin. var. exarata [HC]
Agrostis exarata Trin. var. minor Hook.
Agrostis exarata Trin. var. monolepis (Torr.) Hitchc.
Agrostis exarata Trin. var. monolepsis (Torr.) Hitch. [HC]
Agrostis exarata Trin. var. pacifica Vasey
Agrostis exarata Trin. var. purpurascens Hultén
Agrostis longiligula Hitchc. [HC]
Agrostis longiligula Hitchc. var. australis J.T. Howell
Agrostis melaleuca (Trin.) Hitchc.
Agrostis microphylla Steud. var. major Vasey
Additional Resources:

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

WA Flora Checklist: Agrostis exarata checklist entry.

E-Flora BC: Agrostis exarata atlas page.

CalPhotos: Agrostis exarata photos.

USDA Plants: Agrostis exarata information.

26 photographs:
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