E-Flora BC: Electronic Atlas of the Flora of British Columbia

Epilobium glaberrimum subsp. fastigiatum Barbey (Nutt.) Hoch & P.H. Raven
smooth willowherb (glaucus willowherb)
Onagraceae (Evening Primrose family)

Introduction to Vascular Plants

© Curtis Bjork  Email the photographer   (Photo ID #15939)

E-Flora BC Static Map
Distribution of Epilobium glaberrimum subsp. fastigiatum
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Species Information

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General:
Perennial herb from short, scaly stolon; stems 8-35 cm tall, usually simple, clumped, glabrous with white bloom.
Leaves:
Narrowly lanceolate to egg-shaped, 1-3.4 cm long, 7-18 mm wide, entire to finely toothed, glabrous with white bloom; more or less unstalked, clasping.
Flowers:
Inflorescence erect, terminal; hypanthium 0.7-2.3 mm long; petals 2.5-7 mm long, pink to rose-purple, sometimes white, notched at tip; sepals 1.6-4.0 mm long; anthers 0.5-1 mm long; ovaries 1-3.4 cm long, sparsely short stiff-hairy sometimes with glandular hairs; styles 2.2-3.6 mm long; stigmas club-shaped.
Fruits:
Capsules, 2-5.5 cm long, linear, usually curved, sometimes sparsely hairy; stalks 5-17 mm long; seeds 0.8-1.3 mm long, pimply in lengthwise rows.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist streambanks, rocky slopes, and open forests in the montane to alpine zones; rare in S BC; E to AB and S to MT, UT and CA.

Source: The Illustrated Flora of British Columbia

Climate

The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Epilobium glaberrimum var. fastigiatum (Nutt.) Trel. ex Jepson
Epilobium platyphyllum Rydb.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References