Erythranthe ptilota
sessile-leaved monkey-flower

Distribution: Occurring west of the Cascades crest in Washington; southern British Columbia to California.

Habitat: Wet places generally at low elevations.

Flowers: June-September

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern


Rhizomatous perennials, occasionally rooting at nodes nearest base; stems 20-80 cm, prostrate or decumbent to ascending, only slightly branched, villous eglandular hairs 1-2 mm, occasionally with shorter stipitate-glandular hairs, internodes evident.


Leaves cauline, basal ones not persistent, commonly congested; subsessile to sessile; blade oblong to lanceolate, 30-70 mm long and 10-22 mm broad, pinnate venation, base rounded, margins toothed to finely toothed, apex acute, surfaces hairy as stems.


Axillary flowers 4-10, emerging from nodes at mid- to ends of stems; fruiting pedicels generally 22-50 mm, hairy as stems; calyx winged, cylindric-campanulate, barely inflated, 10-12 mm, villous with gland-tipped hairs, lobes spreading noticeably, strongly unequal, linear-lanceolate to slender-triangular, 5-9 mm, apex long acuminate-apiculate; corollas yellow, throat faintly marked with blackish-brownish lines, symmetric almost radially or weakly bilaterally, nearly regular or weakly bilabiate; tube-throat slenderly bell-shaped, 15-18 mm, protruding beyond calyx margin; lobe apex rounded; styles glabrous; anthers not protruding, covered with fine hairs that are stiff to slightly rigid.


Capsules 6-8 mm, included.

Accepted Name:
Erythranthe ptilota G.L. Nesom
Publication: Phytoneuron 2017-17: 4. 2017.

Synonyms & Misapplications:
Mimulus moschatus Douglas ex Lindl. var. pallidiflorus Suksd.
Additional Resources:

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

WA Flora Checklist: Erythranthe ptilota checklist entry

OregonFlora: Erythranthe ptilota information

E-Flora BC: Erythranthe ptilota atlas page

CalPhotos: Erythranthe ptilota photos

15 photographs:
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