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Montana Field Guide

Montana Field Guides

Narrowleaf Arnica - Arnica angustifolia

Native Species

Global Rank: G5
State Rank: S4

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 6

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General Description
Stems solitary, erect, 5–25 cm. Herbage glandular, villous. Leaves: basal and cauline similar; blades entire, narrowly lanceolate, 2–7 cm long; basal leaves petiolate; stem leaves 1 to 3 pairs, becoming sessile. Heads solitary; involucre campanulate, 10–15 mm high, densely villous. Rays 9 to 14; ligules 1–2 cm long. Pappus short-barbed, white. Achenes hirsute, 3–8 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Our plants are subspecies tomentosa (J.M. Macoun) G.W. Douglas & Ruyle-Douglas.

Range Comments
Circumpolar south to MT (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 10

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat
Stony, calcareous soil of exposed ridges, talus slopes; upper subalpine to alpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Narrowleaf Arnica — Arnica angustifolia.  Montana Field Guide.  .  Retrieved on , from