Senecio crassulus |
Senecio clarkianus |
|
---|---|---|
mountain meadow butterweed, thick-leaf groundsel, thick-leaf ragwort |
Clark's ragwort |
|
Habit | Perennials, (15–)20–50(–70) cm (rhizomes branched, ± woody). | Perennials, (50–)60–100(–120) cm (caudices fibrous-rooted). |
Herbage | glabrous. |
sparsely floccose-tomentose, unevenly glabrescent. |
Stems | 1–(2–4). |
single. |
Leaves | (thickish-turgid) progressively reduced distally; petiolate; blades broadly lanceolate to subelliptic, 2.5–15 × 1–5 cm, bases tapered, margins sharply dentate to subentire (some teeth callous; mid leaves sometimes larger than proximal; distal leaves sessile, smaller, often clasping). |
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 | ± 8 or ± 13; corolla laminae 5–12 mm. |
± 8 or ± 13; corolla laminae 8–12(–20) mm. |
Phyllaries | (± 8) ± 13 or ± 21, 5–9 mm, tips black (villous). |
± 13 or ± 21, 5–8 mm, tips green. |
Calyculi | of (1–)3–6 linear to filiform bractlets (lengths to 1/3 phyllaries). |
of 3–8+ linear to filiform bractlets (lengths 1/2–3/4+ phyllaries). |
Heads | (1–)4–12 in corymbiform arrays. |
8–20 in corymbiform arrays. |
Cypselae | glabrous. |
glabrous. |
2n | = 40. |
|
Senecio crassulus |
Senecio clarkianus |
|
Phenology | Flowering summer. | Flowering late summer. |
Habitat | Moist to drying hillsides, meadows, other open places in forest associations | Moist meadows, conifer-dominated sites |
Elevation | 2200–3700 m (7200–12100 ft) | 1400–2700 m (4600–8900 ft) |
Distribution |
CO; ID; MT; NM; NV; OR; SD; UT; WY
|
CA
|
Discussion | 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. 551. | FNA vol. 20, p. 566. |
Parent taxa | Asteraceae > tribe Senecioneae > Senecio | Asteraceae > tribe Senecioneae > Senecio |
Sibling taxa | ||
Synonyms | S. lapathifolius, S. semiamplexicaulis | |
Name authority | A. Gray: Proc. Amer. Acad. Arts 19: 54. (1883) | A. Gray: Proc. Amer. Acad. Arts 7: 362. (1868) |
Web links |