Senecio bigelovii var. hallii

(Nodding Ragwort)

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Senecio bigelovii var. hallii, Hoosier Pass, Park Co. 9063/9082

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Senecio bigelovii var. hallii, Lower McCullough Gulch, Summit Co 7330

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Senecio bigelovii var. hallii, Newcastle-Buford Rd., White River Plateau, Garfield Co. 6204

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Senecio bigelovii var. hallii, Newcastle-Buford Rd., White River Plateau, Garfield Co. 6220

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Senecio bigelovii var. hallii, Hoosier Pass, Park Co. 9035

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Senecio bigelovii var. hallii, Hoosier Pass, Park Co. 9147/9159

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Senecio bigelovii var. hallii, Hoosier Pass, Park Co. 9123

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Senecio bigelovii var. hallii, Newcastle-Buford Rd., White River Plateau, Garfield Co. 6215

Scientific Name Senecio bigelovii var. hallii USDA PLANTS Symbol SEBI2
Common Name Nodding Ragwort, Rayless Senecio ITIS Taxonomic Serial No. 36103
Family Asteraceae (Sunflower) SEINet
Reference
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Description Life zones and habitat: Montane and subalpine (7800 to 12000 ft.); dry open woods, hillsides and meadows.
Plant: Erect perennial 16 to 40 inches tall, single or a few stems, woolly-hairy (var. hallii) or smooth (var. bigelovii).
Leaves: Ovate to lanceolate, toothed edges, 3 to 6 inches long near base; alternate and much smaller upward; lower leaves usually tapering to petioles and mid and upper leaves may be weakly clasping.
Inflorescence: Small, nodding, composite flower heads about 1/2-inch across in clusters of 2 to 12 rayless heads, each with many yellow disk florets enclosed by phyllaries, green early and becoming dark purple later in the season; ~21 phyllaries 1/3 to 1/2-inch long.
References: "Flora of Colorado" by Jennifer Ackerfield, American Southwest and SEINet 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