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Montana Field Guide

Montana Field Guides

Rayless Arnica - Arnica x diversifolia
Other Names:  Arnica ovata


Global Rank: GNA
State Rank: SNA

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 5

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General Description
Stems solitary or clustered, erect, 15–50 cm. Herbage glabrate to glandular-puberulent. Leaves: basal petiolate on separate shoots; blades ovate, cordate to truncate, dentate, 2–6 cm long; cauline 2 to 4 pairs, short-petiolate, the middle the largest. Heads 1 to 5; involucre turbinate, 8–15 mm high. Rays 8 to13; ligules 10–15 mm long. Pappus subplumose, tawny. Achenes sparsely hirsute, glandular, 5–7 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
AK to CA, UT and
CO (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).


Habitat
Moist, stony soil, of meadows, open slopes, thickets, often along streams; montane, subalpine, rarely lower or higher (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Rayless Arnica — Arnica x diversifolia.  Montana Field Guide.  .  Retrieved on , from