Senecio arizonicus |
Senecio clarkianus |
|
---|---|---|
Arizona ragwort |
Clark's ragwort |
|
Habit | Perennials, (20–)30–40(–60) cm (rhizomes suberect or weakly spreading). | Perennials, (50–)60–100(–120) cm (caudices fibrous-rooted). |
Herbage | lanate-arachnose or tomentose, unevenly glabrescent. |
sparsely floccose-tomentose, unevenly glabrescent. |
Stems | 1(–2). |
single. |
Leaves | (often purplish abaxially) reduced distally; petiolate; blades ovate to subelliptic, (5–)6–10(–15) × (2.5–)3–5(–9) cm, bases tapered or contracted, margins subentire to denticulate (denticles callous; mid and distal leaves bractlike). |
evenly distributed; petiolate; well-developed mid leaves: blades lanceolate to oblong,(8–)10–15(–18) × (2–)3–5(–9) cm overall, margins deeply dentate or irregularly pinnate-lobed to laciniate; distal leaves sessile, weakly clasping. |
Ray florets | ± 13; corolla laminae 5–10 mm. |
± 8 or ± 13; corolla laminae 8–12(–20) mm. |
Phyllaries | (± 13) ± 21, 5–7 mm, tips green. |
± 13 or ± 21, 5–8 mm, tips green. |
Calyculi | of 2–5+ bractlets (largest to 3 mm). |
of 3–8+ linear to filiform bractlets (lengths 1/2–3/4+ phyllaries). |
Heads | (2–)5–12(–20) in corymbiform arrays. |
8–20 in corymbiform arrays. |
Cypselae | hairy (especially on angles). |
glabrous. |
2n | = 40. |
|
Senecio arizonicus |
Senecio clarkianus |
|
Phenology | Flowering late spring–summer. | Flowering late summer. |
Habitat | Openings in pine-oak woodlands | Moist meadows, conifer-dominated sites |
Elevation | 1600–2100 m (5200–6900 ft) | 1400–2700 m (4600–8900 ft) |
Distribution |
AZ
|
CA
|
Discussion | Senecio arizonicus is reputedly in southern New Mexico (W. C. Martin and C. R. Hutchins 1980); that seems unlikely and should be checked. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Senecio clarkianus grows on west slopes of the central and southern Sierra Nevada. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 555. | FNA vol. 20, p. 566. |
Parent taxa | ||
Sibling taxa | ||
Name authority | Greene: Bull. Torrey Bot. Club 10: 87. (1883) | A. Gray: Proc. Amer. Acad. Arts 7: 362. (1868) |
Web links |