E-Flora BC: Electronic Atlas of the Flora of British Columbia

Arnica lanceolata subsp. prima (Maguire) Strother & Wolf
streambank arnica
Asteraceae (Aster family)

Introduction to Vascular Plants
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Distribution of Arnica lanceolata ssp. prima
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Species Information

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General:
Perennial herb from creeping rhizomes; stems leafy, erect, unbranched except in inflorescence, usually somewhat hairy and glandular at least in the upper portion, 15-80 cm tall.
Leaves:
Basal leaves small, often deciduous by flowering time; stem leaves opposite, mostly unstalked, usually in 5-10 pairs (sometimes 4), lance-shaped to oblanceolate, toothed, 2-12 cm long, nearly glabrous to glandular-hairy.
Flowers:
Heads with ray and disk flowers, 1-5 (sometimes up to 10), on stalks with yellowish hairs and often stalked glands; involucres 7-15 mm tall; involucral bracts lance-shaped, sharp-pointed, hairy; ray flowers pale yellow, 8-14, 1-2 cm long, conspicuously toothed at tip; disk flowers yellow.
Fruits:
Achenes 4-6.2 mm long, sparsely stiff-hairy, sometimes glandular; pappus brownish, somewhat feathery.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist to mesic meadows and forest openings in the lowland and montane zones; common in S BC, rare northward; N to S AK and YT and S to CA and NM.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Arnica lanceolata ssp. prima

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

Minimum

Average

Maximum

Elevation (metres) 510 1395 2268
Slope Gradient (%) 0 24 85
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
11 143 273
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 5 7
Modal Nutrient Regime
Class
D
Number of field plots
 species was recorded in:
25
Modal BEC Zone Class
ESSF
All BEC Zones (# of stations/zone) species was recorded in: CWH(1), ESSF(10), ICH(1), MH(4), MS(4), SBPS(1), SBS(1)

Climate

The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Arnica amplexicaulis Nutt.
Arnica amplexicaulis subsp. amplexicaulis

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References