Arnica cordifolia

(Heartleaf Arnica)


Arnica cordifolia, Mayflower Gulch, Summit Co. 0470


Arnica cordifolia, Golden Horseshoe, Summit Co. 4823


Arnica cordifolia, Golden Horseshoe, Summit Co. 4840


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
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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:

© Tom Lebsack 2024

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