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

Epilobium hornemannii subsp. behringianum Rchb. (Hausskn.) Hoch & P.H. Raven
Hornemann's willowherb
Onagraceae (Evening Primrose family)

Introduction to Vascular Plants
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E-Flora BC Static Map
Distribution of Epilobium hornemannii subsp. behringianum
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Species Information

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Perennial herb from short, leafy stolons; stems 10-45 cm tall, loosely clumped, short stiff-hairy in lines below, glandular short stiff-hairy above (in inflorescence).
Broadly elliptic to narrowly egg-shaped below, lance- to narrowly egg-shaped above, 1.5-5.5 cm long, 0.7-2.9 cm wide, finely toothed, glabrous but margins sometimes fringed with short, stiff hairs.
Inflorescence an erect or nodding, terminal raceme; hypanthium 1-2.2 mm long; petals 3-9 mm long, rose to pink, rarely white, notched at tip; sepals 2-4.5 mm long, somewhat glandular; ovaries 1.5-2.5 cm long; anthers 0.4-1.2 mm long; styles 1.7-4.2 mm long; stigmas club-shaped or cylindric.
Capsules, 4-6.5 cm long, linear, green, with scattered glandular and short, stiff hairs; stalks 5-15 mm long; seeds narrowly egg-shaped, 0.9-1.2 mm long, pimply, tuft of hairs white, 6-11 mm long, readily detaching.
Two subspecies occur in BC:

1. Flowering plants with several pairs of broad, withered, persistent leaves at base; leaves relatively thick, margins sharply toothed................. ssp. behringianum (Hausskn.) Hoch & Raven

1. Flowering plants lacking broad, withered leaves at base; leaves relatively thin, margins entire or bluntly toothed...................... ssp. hornemannii

Source: The Illustrated Flora of British Columbia

Habitat / Range

Wet to moist rocky cliffs, meadows, thickets, and river banks in the montane zone; frequent throughout BC, especially along coast (ssp. hornemannii) to rare (ssp. behringianum), found only on the Queen Charlotte Islands; circumboreal, N to AK, YT and NT, E to PQ and NF and S to ME, NM and CA; E Asia.

Source: The Illustrated Flora of British Columbia


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 alpinum var. sertulatum (Hausskn.) S.L. Welsh
Epilobium behringianum Hausskn.
Epilobium sertulatum Hausskn.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References