Erythranthe washingtonensis
Washington monkey-flower

Distribution: Occurring east of the cascades crest in the Columbia River Gorge in Washington; south-central Washington to adjacent north-central Oregon.

Habitat: Shallow or gravelly soils of vernally moist areas at low elevations.

Flowers: April-June

Origin: Native

Growth Duration: Annual

Conservation Status: Historical in Washington (WANHP)


Annuals with fibrous roots or threadlike taproot; stems 5-25 cm, erect to ascending, straight or sharply bent at nodes, typically heavily branched, not angled; puberulent- to villous-glandular, flattened gland-tipped hairs 0.1-0.8 mm, sometimes transparent.


Leaves cauline, basal ones not persistent; petioles 2-14 mm; blade triangular to ovate to narrowly ovate, 4-16 mm long and 2-11 mm broad, palmate venation, base rounded to cuneate to truncate, margins finely toothed or entire, apex acute, surfaces hairy-glandular as stems.


Axillary flowers 1-6, emerging from nodes throughout; fruiting pedicels 20-50 mm, densely covered with minute stalked glands; calyx greenish, ridged, tubular, slightly inflated, 6-8 mm, margins toothed or lobed, covered with minute stalked glands, lobes pronounced, erect; corollas yellow with small reddish brown dots, lower limb with two whitish patches, symmetric bilaterally, bilabiate; tube-throat funnel-shaped and 8-10 mm, protruding beyond calyx margin; limb expanded 7-10 mm, lobes obovate-oblong, apex rounded to somewhat cuneate; styles hispid-hirtellous; anthers not protruding, glabrous.


Capsules 5-8.5 mm, included.

Accepted Name:
Erythranthe washingtonensis (Gand.) G.L. Nesom
Publication: Phytoneuron 2012-39: 1–60. 2012.

Synonyms & Misapplications:
Mimulus washingtonensis Gand. [HC]
Additional Resources:

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

WA Flora Checklist: Erythranthe washingtonensis checklist entry.

E-Flora BC: Erythranthe washingtonensis atlas page.

CalPhotos: Erythranthe washingtonensis photos.

USDA Plants: Erythranthe washingtonensis information.

12 photographs:
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