Epilobium leptophyllum Raf.
narrow-leaved willowherb (bog willowherb)
Onagraceae (Evening Primrose family)
Introduction to Vascular Plants
narrow-leaved willowherb (bog willowherb)
Onagraceae (Evening Primrose family)
Introduction to Vascular Plants
Species Information
General:
Perennial herb, stolons thread-like and tipped with fleshy winter bulblets; stems erect,10-100 cm tall, simple to branched, usually with short leafy bundles in axils, densely short stiff-hairy.
Leaves:
Linear-lanceolate, 2-7.5 cm long, margins rolled under, grey short-hairy above; more or less unstalked.
Flowers:
Inflorescence erect, leafy, terminal; hypanthium 0.8-1.5 mm long; petals 3.5-7 mm long, white to pink; sepals 2.5-4.5 mm long, tips pointed, short stiff-hairy; anthers 0.6-0.9 mm long; ovaries 1.2-1.8 cm long, densely grey short-hairy; styles 2-3.8 mm long; stigmas narrowly club-shaped.
Fruits:
Capsules, 3.5-8 cm long, grey short-hairy; stalks 1-4 mm long; seeds 1.5-2.2 mm long, pimply, tuft of hairs persisting.
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
USDA Species Characteristics
Flower Colour:
Red
Blooming Period:
Summer
Fruit/Seed characteristics:
Colour: Brown
Present from Summer to Fall
According to the USDA, this species is a known allelopath.
Source: The USDA
Ecology
Ecological Framework for Epilobium leptophyllum
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) |
1066 | 780 | 1353 |
| Slope
Gradient (%) |
0 | 0 | 0 |
|
Aspect (degrees) |
0 | ||
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
6 | 6 | 7 |
| Modal
Nutrient Regime
Class |
D | ||
| #
of field plots species was recorded in: |
2 | ||
| Modal
BEC Zone Class |
MS | ||
|
All BEC Zones (# of stations/zone) species was recorded in |
MS(1), SBS(1) | ||
|
Source:
Klinkenberg 2013
|
|||
Habitat and Range
Bogs, fens, marshes and wet meadows in the montane zone; infrequent in E and N BC; N to NT, E to NF and S to NC, CO and CA.Status Information
Synonyms
Synonyms and Alternate Names:
Epilobium nesophilum (Fernald) Fernald
Epilobium nesophilum var. sabulonense Fernald
Epilobium palustre var. gracile (Farw.) Dorn
Epilobium palustre var. sabulonense (Fernald) B. Boivin
Epilobium rosmarinifolium Pursh
Epilobium treleaseanum Levl. p.p.