Erigeron coulteri

(Coulter’s Daisy)

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Erigeron coulteri, Booth Falls, Eagle Co. 4128

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Erigeron coulteri, Peaks Trail, Breckenridge, Summit Co. 1749

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Erigeron coulteri, FR679, Ophir Pass Rd., San Juan Co. 8463

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Erigeron coulteri, FR679, Ophir Pass Rd., San Juan Co. 8450

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Basal leaves, Erigeron coulteri, Pennsylvania Gulch, Summit Co. 1039

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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 2022

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