Arnica louiseana Farr
Lake Louise arnica
Asteraceae (Aster family)
Introduction to Vascular Plants
Lake Louise arnica
Asteraceae (Aster family)
Introduction to Vascular Plants
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Species Information
General:
Perennial herb from a short, branched stem-base; stems erect or ascending, solitary or occasionally a few clustered together, rarely branched above. sparsely long-hairy with multicellular hairs and sometimes glandular, 5-25 cm tall
Leaves:
Basal leaves lanceolate to oblanceolate, 3-5 nerved, glabrous to long-hairy, short to long-stalked, 1-6 cm long; stem leaves 1-4 pairs (rarely absent), the blades lanceolate to oblanceolate, 1.5-7 cm long, 0.4-2.0 cm wide, usually toothed, glabrous to long-hairy, unstalked or short-stalked.
Flowers:
Heads with ray and disk flowers, solitary (rarely 3), usually nodding, the bases long-hairy with yellow hairs; involucres 10-18 mm tall; involucral bracts lanceolate, with short-stalked glands, the tips fringed; ray flowers yellow, 9-15, with conspicuous teeth; disk flowers yellow.
Fruits:
Achenes stiff-hairy and moderately glandular, 4-6 mm long; pappus white, finely-barbed.
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 Arnica louiseana
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) |
2210 | 1760 | 2450 |
| Slope
Gradient (%) |
41 | 22 | 54 |
|
Aspect (degrees) |
225 | 180 | 360 |
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
2 | 2 | 4 |
| Modal
Nutrient Regime
Class |
|||
| #
of field plots species was recorded in: |
3 | ||
| Modal
BEC Zone Class |
AT | ||
|
All BEC Zones (# of stations/zone) species was recorded in |
AT(1), IMA(1) | ||
|
Source:
Klinkenberg 2013
|
|||
Habitat and Range
Mesic to dry meadows and rocky slopes in the alpine zone; rare in SE BC, known only from Kootenay National Park; E to SW AB.Status Information
Synonyms
Synonyms and Alternate Names:
Arnica louiseana subsp. griscomii (Fernald) Maguire
Arnica louiseana var. genuina Maguire