Epilobium glaberrimum Barbey
Glaucous Willowherb (glaucus willowherb; smooth willowherb)
Onagraceae (Evening Primrose family)

Introduction to Vascular Plants

Photograph

© Jamie Fenneman     (Photo ID #14083)


Map

E-Flora BC Static Map

Distribution of Epilobium glaberrimum
Click here to view the full interactive map and legend

SUBTAXA PRESENT IN BC

Epilobium glaberrimum ssp. fastigiatum

Species Information

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.

SourceThe Illustrated Flora of British Columbia

USDA Species Characteristics

Flower Colour:
Purple
Blooming Period:
Mid Summer
Fruit/Seed characteristics:
Colour: White
Present over the Summer
Source:  The USDA

Ecology

Ecological Framework for Epilobium glaberrimum

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class

Avg

Min

Max

Elevation (metres)
956 0 2010
Slope Gradient (%)
8 0 75

Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]

176 20 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
5 3 8
Modal Nutrient Regime
Class
D
# of field plots
 species was recorded in:
95
Modal BEC Zone Class
ESSF

All BEC Zones (# of stations/zone) species was recorded in

BAFA(2), BG(2), BWBS(3), CDF(1), CWH(24), ESSF(28), ICH(6), IDF(2), MH(1), MS(8), SBPS(1), SBS(14)

Habitat and 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.

SourceThe Illustrated Flora of British Columbia