Erigeron coulteri
(Coulter’s Daisy)
Erigeron coulteri, Booth Falls, Eagle Co. 4128
Erigeron coulteri, Peaks Trail, Breckenridge, Summit Co. 1749
Erigeron coulteri, FR679, Ophir Pass Rd., San Juan Co. 8463
Erigeron coulteri, FR679, Ophir Pass Rd., San Juan Co. 8450
Basal leaves, Erigeron coulteri, Pennsylvania Gulch, Summit Co. 1039
Erigeron coulteri, FR679, Ophir Pass Rd., San Juan Co. 8454
| Scientific Name | Erigeron coulteri | USDA PLANTS Symbol | ERCO6 |
| Common Name | Coulter's Daisy, Whiteray Daisy | ITIS Taxonomic Serial No. | 35845 |
| Family | Asteraceae (Sunflower) | SEINet Reference |
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| Description | Life zones and habitat: Foothills to alpine (7500 to 14000 ft.); moist areas, meadows, streambanks, open woodlands. Plant: Erect perennial 4 to 24 inches tall, somewhat hairy or smooth, leafy stems. Leaves: Hairy basal and stem leaves, lower blades broadly oblanceolate to elliptic or oblong-lanceolate, 1-1/4 to 4-3/4 inches long and 1/4 to 1 inch wide, margins entire or with 1 to 5 pairs of shallow teeth; upper stem leaves becoming elliptic-ovate to lanceolate and gradually smaller with clasping bases. Basal leaves may be persistent (lasting through the bloom period). Inflorescence: Single composite flower heads 1-1/2 inches across with 45 to 140 white or pale lavender rays; yellow disk florets; phyllaries with blackish hairs, glandular. 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 Map Color Key |
Colorado Status: Native |
© Tom Lebsack 2025
Banner photo: Castilleja rhexifolia and a brewing storm over the San Juan Mountains
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