Senecio atratus

Greene

Pittonia 3: 105. 1896.

IllustratedEndemic
Synonyms: Senecio atratus var. milleflorus (Greene) Greenman Senecio milleflorus
Treatment appears in FNA Volume 20. Treatment on page 554. Mentioned on page 547.

Perennials, (20–)35–70(–80+) cm (rhizomes or caudices branched, erect to weakly creeping). Herbage floccose-tomentose to canescent, sometimes unevenly glabrescent. Stems 1–(2–5). Leaves progressively reduced distally; petiolate; blades oblong-ovate to oblanceolate, (5–)10–30 × 1.5–4(–6) cm, bases tapered, margins dentate (denticles, dark, callous; mid leaves similar, sessile, smaller; distal leaves bractlike). Heads 20–60+ in corymbiform or subpaniculiform arrays. Calyculi of 2–5 linear bractlets (lengths to 1/3 phyllaries). Phyllaries (± 5) ± 8, 6–8 mm, tips black. Ray florets (± 3) ± 5; corolla laminae 5–8 mm. Cypselae glabrous. 2n = 40. (A report of 2n = 46 is presumably erroneous.)


Phenology: Flowering late spring–early fall.
Habitat: Dry or drying, rocky or sandy sites in coniferous areas, especially sites with frequent disturbance
Elevation: 2800–4000 m

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Senecio atratus"
Theodore M. Barkley† +
Greene +
Colo. +, N.Mex. +, Utah +  and Wyo. +
2800–4000 m +
Dry or drying, rocky or sandy sites in coniferous areas, especially sites with frequent disturbance +
Flowering late spring–early fall. +
Illustrated +  and Endemic +
Senecio atratus var. milleflorus +  and Senecio milleflorus +
Senecio atratus +
species +