Arnica latifolia

(Broadleaf Arnica)


Arnica latifolia, North Swan River, Summit Co. 5108


Arnica latifolia, Mayflower Gulch, Summit Co. 2621


Arnica latifolia, Mayflower Gulch, Summit Co. 6902

Scientific Name Arnica latifolia USDA PLANTS Symbol ARLA8
Common Name Broadleaf Arnica ITIS Taxonomic Serial No. 36566
Family Asteraceae (Sunflower) SEINet
Click Here
Description Life zones and habitat: Montane to alpine (8800 to 13000 ft.); moist areas in forests, meadows and open areas.
Plant: Erect perennial 8 to 14 inches tall, slender, sticky stems.
Leaves: Opposite, lance-elliptic to ovate leaves 2 inches long; lower leaves with winged petioles; mid and upper leaves becoming sessile; margins serrate to dentate; 2 to 4 pairs per stem.
Inflorescence: Single or up to 3 flower heads, each 1 to 1-1/2 inches across with 8 to 16 ray flowers, many darker yellow disk flowers; hairy, pointed green and white phyllaries.
Bloom Period: July and August.
References: Notes from Jane Hendrix, Breckenridge, "Flora of Colorado" by Jennifer Ackerfield, SEINet and "Guide to Colorado Wildflowers" by G.K. Guennel.
Note: Similar to Heartleaf Arnica (Arnica cordifolia) except that lower leaf petioles are short, the leaves are not heart-shaped and it blooms in mid-August when most Heartleaf Arnica plants have gone to seed and their leaves are turning color.
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