Arnica mollis

(Hairy Arnica)

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Arnica mollis, Lower McCullough Gulch, Summit Co. 8115

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Arnica mollis, Mayflower Gulch, Summit Co. 7692

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Arnica mollis, Brown's Pass, Park Co. 4346

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Arnica mollis, Lower McCullough Gulch, Summit Co. 8108

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Arnica mollis, Mayflower Gulch, Summit Co. 7690

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Arnica mollis, Shrine Ridge Trail, Eagle Co. 6964

Scientific Name Arnica mollis USDA PLANTS Symbol ARMO4
Common Name Hairy Arnica ITIS Taxonomic Serial No. 36571
Family Asteraceae (Sunflower) SEINet
Reference
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Description Life zones and habitat: Foothills to alpine (7500 to 13300 ft.); moist areas in meadows, near streams and rocky slopes.
Plant: Erect, clump-forming perennial 6 to 24 inches tall, minutely hairy, glandular stems, single or sometimes branched near heads.
Leaves: Opposite, large (1-1/2 to 7-1/2 inches long), ovate to lanceolate or oblanceolate leaves, soft, hairy and sticky; margins entire or irregularly denticulate, 2 to 4 pairs per stem.
Inflorescence: Flower heads, 1 to 3 per plant, 2 inches across with 10 to 22 ray flowers, many yellow disk flowers in a hemispherical disk; hairy, usually broadly lanceolate pointed phyllaries.
Bloom Period: July to September.
References: "Flora of Colorado" by Jennifer Ackerfield, "Guide to Colorado Wildflowers" by G.K. Guennel and Flora of North America.
BONAP Distribution Map

Map Color Key
Colorado Status:
Native

© Tom Lebsack 2022

Banner photo: Ten Mile Range and Rhodiola integrifolia (King’s Crown) in Summit County