Page author: David Giblin
Epilobium minutum
California willowherb, chaparral willowherb, small-flowered willowherb

Distribution: Both sides of the Cascades crest in Washington; common from British Columbia south to California, east to Montana.

Habitat: Dry or gravelly soil, sea level to mid-elevations in the mountains.

Flowers: April-August

Origin: Native

Conservation Status: Not of concern


Finely appressed-puberulent annual, the stems freely-branched, 0.3-4.5 dm. tall.


Leaves mostly opposite, short-petiolate, the blades oblong-lanceolate, 1-2.5 cm. long.


Flowers on short pedicels in the axils of alternate leaves; calyx tube cup-shaped, 1 mm. long, 4-lobed; petals 4, white to rose, bi-lobed; stamens 8; stigma entire; ovary inferior, 4-celled.


Capsule 1.5-2.5 cm. long, linear, slightly curved; seeds with a tuft of pale yellow hairs at the tip.

Accepted Name:
Epilobium minutum Lindl.
Publication: Fl. Bor.-Amer. 1: 207. 1833.

Synonyms & Misapplications:
Epilobium foliosum (Torr. & A. Gray) Suksd. [JPM2]
Epilobium minutum Lindl. var. foliosum Torr. & A. Gray
Additional Resources:

PNW Herbaria: Specimen records of Epilobium minutum in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Epilobium minutum checklist entry.

E-Flora BC: Epilobium minutum atlas page.

CalPhotos: Epilobium minutum photos.

USDA Plants: Epilobium minutum information.

31 photographs:
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