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

Arnica ovata Greene
leaf arnica (diverse arnica)
Asteraceae (Aster family)

Introduction to Vascular Plants

© Bryan Kelly-McArthur  Email the photographer   (Photo ID #79287)

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Distribution of Arnica ovata
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Species Information

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General:
Perennial herb, from a freely rooted rhizome; stems erect, solitary or occasionally a few clustered together, sparsely long-hairy and often glandular, 15-45 cm tall.
Leaves:
Basal leaves smaller than stem leaves and often deciduous by flowering time; stem leaves opposite, 2-4 (rarely 5) pairs, egg-shaped to elliptic or lance-elliptic, short-stalked below and unstalked above, uppermost ones reduced.
Flowers:
Heads with ray and disk flowers, usually 1-4, rarely as many as 7, the bases hairy and often glandular; involucres 9-15 mm tall; involucral bracts lanceolate, sparsely (usually) to densely long-hairy and often glandular-fringed with small hairs; ray flowers yellow, 12-15, inconspicuously toothed; disk flowers yellow.
Fruits:
Achenes 5-7 mm long, glabrous or sparsely hairy; pappus tawny to brownish, more or less feathery.
Notes:
This "species" is merely a convenient name for a complex series of apparent hybrids involving either A. mollis or A. amplexicaulis and A. cordifolia or A. latifolia (Cronquist 1955). Most of the BC material examined which had been placed under this name is better placed in A. mollis.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Mesic forests in the montane zone; infrequent in S BC; N to AK and YT, S to N MT and CA.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Arnica ovata

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) 1177 1928 2380
Slope Gradient (%) 0 26 74
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
10 85 352
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 4 7
Modal Nutrient Regime
Class
D
Number of field plots
 species was recorded in:
33
Modal BEC Zone Class
ESSF
All BEC Zones (# of stations/zone) species was recorded in: AT(4), BAFA(2), ESSF(19), ICH(2), IMA(1), MS(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 diversifolia

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References