Page author: David Giblin
Erythranthe lewisii
great purple monkey-flower

Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to Montana, Wyoming and Colorado.

Habitat: Common in wet meadows and along rivers and streams from middle to high elevations in the mountains, occasionally found along low elevation rivers.

Flowers: June-August

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Bees


Perennial from stout, branching rhizomes, the stout stems clustered, 3-10 dm. tall; herbage viscid-villous.


Leaves opposite, sessile, with several prominent veins from the base, irregularly dentate to entire, the lower ones reduced; leaves lanceolate to ovate or elliptic, acute, 3-7 cm. long and 1-3.5 cm. wide.


Flowers solitary in the leaf axils on pedicels 3-6 cm. long; calyx 1.5-2.5 cm. long, the 5 teeth sharp-pointed and equal; corolla showy, purplish-pink, marked with yellow, 3.5-5 cm. long, strongly bilabiate; stamens 4.



Accepted Name:
Erythranthe lewisii (Pursh) G.L. Nesom & N.S. Fraga
Publication: Phytoneuron 2012-39: 1–60. 2012.

Synonyms & Misapplications:
Mimulus lewisii Pursh [HC]
Additional Resources:

PNW Herbaria: Specimen records of Erythranthe lewisii in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Erythranthe lewisii checklist entry.

OregonFlora: Erythranthe lewisii information.

E-Flora BC: Erythranthe lewisii atlas page.

CalPhotos: Erythranthe lewisii photos.

USDA Plants: Erythranthe lewisii information.

102 photographs:
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