Page author: David Giblin
Epilobium brachycarpum
autumn willowherb, tall annual willowherb

Distribution: Throughout Washington; British Columbia south to California, east to Wisconsin in the north and New Mexico in the south.

Habitat: Common in dry, open meadows and grasslands to lightly wooded areas.

Flowers: July-August

Origin: Native

Conservation Status: Not of concern


Glabrous annual, the stems very freely-branched, 3-10 dm. tall.


Leaves alternate almost throughout, petiolate, narrowly lanceolate to linear, mostly entire; leaves of the main stem 3-7 cm. long, but those on the side branches much smaller.


Flowers in few-flowered, lax racemes terminating the numerous branches; bracts linear; pedicels 5-20 mm. long; calyx tube narrowly funnel-shaped, 2-12 mm. long, 4-lobed; petals 4, rose to pale pink, obovate, bi-lobed, 3-12 mm. long; stamens 8; stigma mostly entire; ovary inferior, 4-celled.


Capsule 1.5-2.5 cm. long, linear, club-shaped; seed with a tuft of pale yellow hairs on the tip.

Accepted Name:
Epilobium brachycarpum C. Presl
Publication: Reliq. Haenk. 2(1): 30. 1831.

Synonyms & Misapplications:
Epilobium paniculatum Nutt. ex Torr. & A. Gray [HC]
Epilobium paniculatum Nutt. var. jucundum (A. Gray) Trel. [HC]
Epilobium paniculatum Nutt. ex Torr. & A. Gray var. juncundum (A. Gray) Trel.
Epilobium paniculatum Nutt. ex Torr. & A. Gray var. paniculatum [HC]
Epilobium paniculatum Nutt. ex Torr. & A. Gray var. subulatum (Hausskn.) Fernald
Additional Resources:

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

WA Flora Checklist: Epilobium brachycarpum checklist entry.

E-Flora BC: Epilobium brachycarpum atlas page.

CalPhotos: Epilobium brachycarpum photos.

USDA Plants: Epilobium brachycarpum information.

60 photographs:
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