Page author: David Giblin
Epilobium glaberrimum
smooth willow-herb
Specimens
Photos

Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.

Habitat: Wet places at mid-elevations in the mountains.

Flowers: June-August

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Bees, flies

Description:
General:

Glabrous, glaucous perennial from branching rhizomes, the stems many, simple or basally branched, erect, 1-5 dm. tall.

Leaves:

Leaves opposite, numerous and overlapping, sessile and slightly clasping, oblong-lanceolate to ovate, obtuse, entire to denticulate, 1.5-4.5 cm. long, gradually reduced upward.

Flowers:

Inflorescence of terminal, bracteate racemes; pedicels 5-20 mm. long; calyx tube 1.5 mm. long, the 4 lobes 2-4 mm. long, rose to purplish-tinged; petals 4, 4-8 mm. long, notched, light pink to deep rosy-purple; stamens 8; stigma entire; ovary inferior, 4-celled.

Fruits:

Capsule 4-7 cm. long, linear, curved, glabrous; seeds with a tuft of white hairs at the tip.

Accepted Name:
Epilobium glaberrimum Barbey
Publication: Bot. California [W.H.Brewer] i. 220. 1876.

Synonyms & Misapplications:
Epilobium glaberrimum Barbey ssp. fastigiatum (Nutt.) Hoch & P.H. Raven [JPM2]
Epilobium glaberrimum Barbey ssp. glaberrimum [JPM2]
Epilobium glaberrimum Barbey var. fastigatum (Nutt.) Trel., orthographic variant [HC]
Epilobium glaberrimum Barbey var. fastigiatum (Nutt.) Trel.
Epilobium glaberrimum Barbey var. glaberrimum [HC]
Additional Resources:

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

WA Flora Checklist: Epilobium glaberrimum checklist entry

OregonFlora: Epilobium glaberrimum information

E-Flora BC: Epilobium glaberrimum atlas page

CalPhotos: Epilobium glaberrimum photos

39 photographs:
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