Senecio aphanactis |
Senecio astephanus |
|
---|---|---|
California groundsel, chaparral ragwort, rayless ragwort |
San Gabriel ragwort |
|
Habit | Annuals, 5–20+ cm (taproots relatively short and thin). | Perennials, 40–100 cm (caudices unknown). |
Herbage | glabrous or sparsely tomentose (especially distally). |
unevenly floccose-lanate or tomentose, 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). |
progressively reduced distally; petiolate; blades elliptic-ovate to lanceolate, 10–20(–30?) × 3–7+ cm, bases tapered, margins dentate to denticulate (teeth cartilaginous; mid leaves similar, sessile, smaller; distal leaves bractlike). |
Ray florets | 0 or 1–5; corolla laminae 0.5–1+ mm (barely surpassing phyllaries, heads perhaps technically disciform). |
0. |
Phyllaries | ± 8 or ± 13, 5–6 mm, tips greenish. |
± 21, 7–8 mm, tips greenish. |
Calyculi | 0 or of 1–3+ lance-deltate bractlets. |
of 5–8+ lance-linear to filiform bractlets (lengths 1/3–7/8 phyllaries). |
Heads | 4–10+ in open, cymiform arrays. |
10–20+ in loose or congested, cymiform arrays. |
Cypselae | densely hairy. |
glabrous. |
2n | = 40. |
= 40. |
Senecio aphanactis |
Senecio astephanus |
|
Phenology | Flowering late winter–spring. | Flowering spring. |
Habitat | Dry, open ground, especially alkaline flats | Steep, rocky slopes |
Elevation | 10–400 m (0–1300 ft) | 400–1500 m (1300–4900 ft) |
Distribution |
CA; Mexico (Baja California)
|
CA |
Discussion | Of conservation concern. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Senecio astephanus is collected infrequently. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 563. | FNA vol. 20, p. 553. |
Parent taxa | Asteraceae > tribe Senecioneae > Senecio | Asteraceae > tribe Senecioneae > Senecio |
Sibling taxa | ||
Name authority | Greene: Pittonia 1: 220. (1888) | Greene: Pittonia 1: 174. (1888) |
Web links |