Senecio aphanactis |
Senecio clarkianus |
|
---|---|---|
California groundsel, chaparral ragwort, rayless ragwort |
Clark's ragwort |
|
Habit | Annuals, 5–20+ cm (taproots relatively short and thin). | Perennials, (50–)60–100(–120) cm (caudices fibrous-rooted). |
Herbage | glabrous or sparsely tomentose (especially distally). |
sparsely floccose-tomentose, unevenly glabrescent. |
Stems | usually 1 (relatively thin, delicate). |
single. |
Leaves | evenly distributed; sessile; blades oblanceolate to lance-linear, 2–4 × 0.5–1 cm, bases sometimes weakly clasping, margins usually subpinnate to dentate, sometimes subentire (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 | 0 or 1–5; corolla laminae 0.5–1+ mm (barely surpassing phyllaries, heads perhaps technically disciform). |
± 8 or ± 13; corolla laminae 8–12(–20) mm. |
Phyllaries | ± 8 or ± 13, 5–6 mm, tips greenish. |
± 13 or ± 21, 5–8 mm, tips green. |
Calyculi | 0 or of 1–3+ lance-deltate bractlets. |
of 3–8+ linear to filiform bractlets (lengths 1/2–3/4+ phyllaries). |
Heads | 4–10+ in open, cymiform arrays. |
8–20 in corymbiform arrays. |
Cypselae | densely hairy. |
glabrous. |
2n | = 40. |
|
Senecio aphanactis |
Senecio clarkianus |
|
Phenology | Flowering late winter–spring. | Flowering late summer. |
Habitat | Dry, open ground, especially alkaline flats | Moist meadows, conifer-dominated sites |
Elevation | 10–400 m (0–1300 ft) | 1400–2700 m (4600–8900 ft) |
Distribution |
CA; Mexico (Baja California)
|
CA
|
Discussion | Of conservation concern. (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. 563. | FNA vol. 20, p. 566. |
Parent taxa | Asteraceae > tribe Senecioneae > Senecio | Asteraceae > tribe Senecioneae > Senecio |
Sibling taxa | ||
Name authority | Greene: Pittonia 1: 220. (1888) | A. Gray: Proc. Amer. Acad. Arts 7: 362. (1868) |
Web links |