Epilobium hallianum
Hall's willowherb
Onagraceae (Evening Primrose family)

Introduction to Vascular Plants

Photograph

© Jamie Fenneman     (Photo ID #29948)


Map

E-Flora BC Static Map

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

Species Information

General:
Perennial herb from scaly succulent shoots from a rhizome; stems 20-60 cm tall, with lines of short, stiff hairs below, mixed with glandular hairs above; winter bulblets small, underground.
Leaves:
Opposite, at least below, egg-shaped to elliptic below, narrower above, 0.5-4.7 cm long, 3-14 mm wide, blunt to somewhat pointed, entire to finely toothed, mostly glabrous, fringed with short, stiff hairs; unstalked or stalks to 1.5 mm long.
Flowers:
Inflorescence more or less nodding when in bud; hypanthium 0.5-1.7 mm long; petals 1.6-5.5 mm long, white or pink, notched at tip; sepals 1.2-2.8 mm long, green, glabrous or sparsely glandular-hairy, anthers 0.3-0.9 mm long; ovaries 1.0-1.4 cm long, densely glandular-hairy and short stiff-hairy, rarely glabrous; styles 0.8-5 mm long; stigmas club-shaped.
Fruits:
Capsules, 2.4-6 cm long, glabrous to hairy; stalks 10-40 mm long; seeds narrowly egg-shaped, 1.1-1.6 mm long, pimply, tuft of hairs white, 3-6 mm long, readily detaching.

SourceThe Illustrated Flora of British Columbia

Illustration

If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

Ecology

Ecological Framework for Epilobium hallianum

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)
900 870 930
Slope Gradient (%)
0 0 0

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

0
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
6 6 7
Modal Nutrient Regime
Class
B
# of field plots
 species was recorded in:
2
Modal BEC Zone Class
IDF

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

IDF(1), SBS(1)

Habitat and Range

Moist slopes and open forests in the montane zone; rare throughout BC; E to W SK and S to SD, CO, AZ and CA.

SourceThe Illustrated Flora of British Columbia

Synonyms

Synonyms and Alternate Names:
Epilobium halleanum Hausskn.