Arnica cordifolia

(Heartleaf Arnica)

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Arnica cordifolia, Mayflower Gulch, Summit Co. 0470

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Arnica cordifolia, Golden Horseshoe, Summit Co. 4823

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Arnica cordifolia, Golden Horseshoe, Summit Co. 4840

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Arnica cordifolia, Golden Horseshoe, Summit Co. 4827

Scientific Name Arnica cordifolia USDA PLANTS Symbol ARCO9
Common Name Heartleaf Arnica ITIS Taxonomic Serial No. 36561
Family Asteraceae (Sunflower) SEINet
Reference
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Description Life zones and habitat: Foothills to subalpine (6000 to 12000 ft.); moist, shady woodlands and streamsides.
Plant: Erect single-stem perennial 3 to 24 inches tall.
Leaves: Opposite, petiolate, heart-shaped velvety leaves up to 4 inches long with dentate margins, 2 to 4 pairs per stem.
Inflorescence: Large flower heads (2 to 3 inches across), usually 1 to 3 per plant, with 6 to 13 ray flowers, many yellow disk flowers, hairy phyllaries.
Bloom Period: June to September.
References: "Guide to Colorado Wildflowers" by G.K. Guennel and "Flora of Colorado" by Jennifer Ackerfield.
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