Epilobium clavatum Trel.
club-fruited willowherb (talus willowherb)
Onagraceae (Evening Primrose family)
Introduction to Vascular Plants
club-fruited willowherb (talus willowherb)
Onagraceae (Evening Primrose family)
Introduction to Vascular Plants
Species Information
General:
Perennial herb spreading by basal shoots or wiry suckers from a stem-base or rhizome; stems ascending, 5-20 cm tall, tufted, finely stiff-hairy, especially above.
Leaves:
Elliptic to egg-shaped, 1.2-2.8 cm long, blunt to almost pointed at tips, glabrous or margins and midrib slightly hairy; unstalked or stalks 2-3 mm long.
Flowers:
Inflorescence an erect, glandular-hairy, terminal raceme; hypanthium 0.6-2 mm long; petals 3.5-6 mm long, pink to rose-purple, notched at tip; sepals 2.5-4.5 mm long, glabrous or somewhat glandular; styles 1.4-3.2 mm long; stigmas club-like.
Fruits:
Capsules club-shaped, 2-4 cm long, 2-3 mm wide, glabrous or slightly hairy; seeds 1.3-2.0 mm long, net-veined or pimply, tuft of hairs present but easily detached, 5-15 mm long; stalks 2-18 mm long.
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.
Illustration Source: The Illustrated Flora of British Columbia
Ecology
Ecological Framework for Epilobium clavatum
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)
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) |
1900 | 1280 | 2375 |
| Slope
Gradient (%) |
30 | 3 | 85 |
|
Aspect (degrees) |
175 | 28 | 324 |
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
4 | 1 | 7 |
| Modal
Nutrient Regime
Class |
D | ||
| #
of field plots species was recorded in: |
17 | ||
| Modal
BEC Zone Class |
ESSF | ||
|
All BEC Zones (# of stations/zone) species was recorded in |
BAFA(1), ESSF(13), IMA(1), MS(1) | ||
|
Source:
Klinkenberg 2013
|
|||
Habitat and Range
Moist rocky or grassy meadows and scree slopes in the montane to alpine zones; common throughout BC; N to AK, YT and NT, S to CO, UT and CA.Status Information
Synonyms
Synonyms and Alternate Names:
Epilobium alpinum var. albiflorum (Suksd.) C.L. Hitchc.
Epilobium alpinum var. clavatum (Trel.) C.L. Hitchc.
Epilobium clavatum var. clavatum
Epilobium clavatum var. glareosum (G.N. Jones) Munz