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

Arnica lonchophylla Greene
northern arnica (alpine arnica; long-leaf arnica)
Asteraceae (Aster family)

Introduction to Vascular Plants

© Amelie Rousseau  Email the photographer   (Photo ID #6210)

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Distribution of Arnica lonchophylla
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Species Information

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General:
General: Perennial herb, from an ascending, fibrous-rooted rhizome or stem-base; stems leafy, erect or sometimes ascending, simple or branched only in the inflorescence, sparsely to densely hairy or sometimes glandular at least in the upper portion, 10-50 cm tall.
Leaves:
Basal leaves lance-shaped to narrowly elliptic, hairy and often glandular, stalked, entire to toothed; stem leaves opposite, 2-4 pairs (rarely 1 or 5), reduced and becoming unstalked and entire upwards.
Flowers:
Heads with ray and disk flowers, solitary to 5 (rarely 7), the bases densely white-hairy; involucres 10-18 mm tall; involucral bracts lance-shaped, hairy, and usually glandular; ray flowers yellow, 10-16, toothed at the apex; disk flowers yellow.
Fruits:
Achenes 4-8 mm long, uniformly densely hairy and often glandular; pappus white, finely-barbed.
Notes:
Four subspecies occur in BC.

1. Plants and involucres conspicuously white, woolly long-hairy; stems 5-20 cm tall, common in the alpine zone throughout BC east of the Coast-Cascade Mountains.................... ssp. tomentosa (Macoun) G. W. Dougl. & G. Ruyle-Dougl.

1. Plants and involucres never conspicuously white, woolly long-hairy; stems 10-50 cm tall, frequent in N and E BC.

2. Leaves regularly toothed (at least the basal ones), lower leaves long-stalked; stems 20-45 cm tall, frequent in the montane zone of the Rocky Mountains of NE and SE BC.................. ssp. lonchophylla (Greene) G.W. Dougl.& G. Ruyle-Dougl.

2. Leaves entire or sometimes irregularly toothed, lower leaves short-stalked; stems 10-45 cm tall, plants of the montane and lower subalpine zones of N BC.

3. Heads solitary (rarely 3); stem leaves 2-3 pairs; stems 10-25 (rarely 30) cm tall..................... ssp. Angustifolia

3. Heads 3-5 (rarely 1 or 7), stem leaves 4-5 pairs (rarely 3 pairs); stems 15-45 cm tall.................... ssp. attenuata (Greene) G.W. Dougl. & G. Ruyle-Dougl.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Mesic to dry sites from the montane to alpine zones; common in BC east of the Coast-Cascade Mountains (see key below); circumboreal, N to AK and YT, E to NF and S to MN, SD and WA; Eurasia.

Source: The Illustrated Flora of British Columbia

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 arnoglossa Greene
Arnica lonchophylla var. arnoglossa (Greene) B. Boivin

Taxonomic and Nomenclatural Links

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General References