Hairy Arnica (Arnica mollis)
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| 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
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Colorado Status: Native |
| Scientific Name | Arnica latifolia | USDA PLANTS Symbol |
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| Common Name | Broadleaf Arnica | ITIS Taxonomic Serial No. |
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| Family | Asteraceae (Sunflower) | SEINet Reference |
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| 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. 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. References: Notes from Jane Hendrix, Breckenridge, "Flora of Colorado" by Jennifer Ackerfield, SEINet and "Guide to Colorado Wildflowers" by G.K. Guennel. |
BONAP Distribution Map
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Colorado Status: Native |
| 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
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Colorado Status: Native |
| Scientific Name | Arnica parryi | USDA PLANTS Symbol |
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| Common Name | Rayless Arnica, Parry's Arnica, Nodding Arnica | ITIS Taxonomic Serial No. |
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| 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 and short, purple-tinged phyllaries. Bloom Period: July to September. References: "Guide to Colorado Wildflowers" by G.K. Guennel, "Flora of Colorado" by Jennifer Ackerfield, SEINet, and Jepson eFlora. |
BONAP Distribution Map
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Colorado Status: Native |
| Scientific Name | Arnica rydbergii | USDA PLANTS Symbol |
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| Common Name | Subalpine Arnica | ITIS Taxonomic Serial No. |
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| Family | Asteraceae (Sunflower) | SEINet Reference |
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| Description |
Life zones and habitat: Montane to alpine (10000 to 13500 ft.); meadows and rocky areas. Plant: Erect perennial, somewhat tufted, 2 to 12 inches tall; sticky stems with short hairs. Leaves: Stem leaves in 2 to 4 widely-spaced pairs, opposite, oblanceolate to lanceolate; petiolate below, sessile above, and may have denticulate margins; basal leaves oblanceolate to spatulate clustered and usually petiolate; surfaces slightly hairy below, moderately pubescent further up the stem. Inflorescence: Flower heads, 1 to 3 per plant, with 6 to 10 yellow ray flowers, many yellow disk flowers; involucre with hairy, pointed phyllaries with dark reddish tips. Bloom Period: July and August. References: "The Alpine Flora of the Rocky Mountains" by Richard W. Scott, "Flora of Colorado" by Jennifer Ackerfield, SEINet, and www.swcoloradowildflowers.com. |
BONAP Distribution Map
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Colorado Status: Native |
