Senecio atratus
(Tall Black-tip Ragwort)
Senecio atratus, Golden Horseshoe, Breckenridge, Summit Co. 9220/9232
Senecio atratus, Golden Horseshoe, Breckenridge, Summit Co. 9241
Senecio atratus, Hoosier Pass, Park Co. 4404
Senecio atratus, Blue Lakes, Summit Co 1216
Upper leaf surface, Senecio atratus, Golden Horseshoe, Breckenridge, Summit Co. 9238
Lower leaf surface, Senecio atratus, Golden Horseshoe, Breckenridge, Summit Co. 9237
Senecio atratus, Golden Horseshoe, Breckenridge, Summit Co. 9245
| Scientific Name | Senecio atratus | USDA PLANTS Symbol | SEAT |
| Common Name | Tall Black-tip Ragwort | ITIS Taxonomic Serial No. | 36101 |
| Family | Asteraceae (Sunflower) | SEINet Reference |
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| Description |
Life zones and habitat: Foothills to alpine (7000 to 13200 ft.); roadsides, along trails, rocky areas.
Plant: Erect perennial 14 to 32 inches tall, single or multiple stout, hairy, ribbed stems, in clumps. Leaves: Hairy, oblong-ovate to oblanceolate with pointed tips and shallowly dentate edges, 4 to 12 inches long, petiolate; basal leaves angled upward, stem leaves are alternate. Inflorescence: Small composite flower heads about 1/2-inch across in large clusters of 20 to 60 heads; about 5 thin yellow rays, 10 to 12 orange disk florets; light green phyllaries below with black tips. Bloom Period: July to September. References: "Flora of Colorado" by Jennifer Ackerfield, SEINet and American Southwest. |
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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