Arnica parryi
(Rayless Arnica)
Arnica parryi, Mayflower Gulch, Summit Co. 8371
Arnica parryi, County Line Trail, Grand Mesa NF, Delta Co. 0466
Arnica parryi, Loveland Pass, Clear Creek Co. 6831
Arnica parryi, Mayflower Gulch, Summit Co. 8383
Arnica parryi, County Line Trail, Grand Mesa NF, Delta Co. 0472
Leaves, Arnica parryi, Mayflower Gulch, Summit Co. 8377
Arnica parryi, County Line Trail, Grand Mesa NF, Delta Co. 0454
| Scientific Name | Arnica parryi | USDA PLANTS Symbol | ARPA13 |
| Common Name | Rayless Arnica, Parry's Arnica, Nodding Arnica | ITIS Taxonomic Serial No. | 36574 |
| Family | Asteraceae (Sunflower) | SEINet Reference |
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| Description | Life zones and habitat: Montane to alpine (8000 to 12500 ft.); moist meadows, open forests and groves. Plant: Erect perennial 18 to 24 inches tall, hairy stems. Leaves: Stem leaves opposite, up to 4 pairs per stem, 1-1/2 to 7-1/2 inches long, lanceolate with hairy edges; lower leaves petiolate, upper leaves sessile; basal leaves (if present) shorter, ovate, and sessile. Inflorescence: Bell-shaped flower heads, 3 to 9 per plant, 3/4-inch long with no ray flowers; many dark yellow disk flowers; involcre is bell shaped and the green, narrowly-lanceolate or linear phyllaries with soft, glandular hairs. Bloom Period: July to September. References: "Guide to Colorado Wildflowers" by G.K. Guennel, "Flora of Colorado" by Jennifer Ackerfield, SEINet, American Southwest and Jepson eFlora. |
BONAP Distribution Map
Map Color Key |
Colorado Status: Native |
© Tom Lebsack 2024
Banner photo: Ten Mile Range and Rhodiola integrifolia (King’s Crown) in Summit County