Page authors: Don Knoke, David Giblin
Muhlenbergia richardsonis
matted muhly

Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains, Great Plains, Great Lakes region, and northeastern North America.

Habitat: Moist to dry lowlands, meadows, mountain prairies and rocky slopes.

Flowers: July-August

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Wind


Strongly rhizomatous, often matted perennial, the culms solid, slightly flattened, 0.5-3 dm. tall.


Sheaths open; ligules acute, 1-2 mm. long; blades 1.1.5 mm. broad, somewhat involute.


Inflorescence a narrow, spike-like panicle 5-7 cm. long; spikelets 1-flowered; glumes about 1 mm. long, subequal, broad, the mid-nerve very prominent; lemmas 3-nerved, 2-3 mm. long, minutely awn-tipped; paleas 2-nerved, subequal to the lemmas.

Accepted Name:
Muhlenbergia richardsonis (Trin.) Rydb.
Publication: Bull. Torrey Bot. Club 32(11): 600. 1905.

Synonyms & Misapplications:
Muhlenbergia squarrosa (Trin.) Rydb.
Sporobolus depauperatus (Torr. ex Hook.) Scribn.
Additional Resources:

PNW Herbaria: Specimen records of Muhlenbergia richardsonis in the Consortium of Pacific Northwest Herbaria database

WA Flora Checklist: Muhlenbergia richardsonis checklist entry

OregonFlora: Muhlenbergia richardsonis information

E-Flora BC: Muhlenbergia richardsonis atlas page

CalPhotos: Muhlenbergia richardsonis photos

14 photographs:
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