Senecio crassulus |
Senecio sphaerocephalus |
|
---|---|---|
mountain meadow butterweed, thick-leaf groundsel, thick-leaf ragwort |
ball-head ragwort, marsh groundsel, mountain marsh butterweed |
|
Habit | Perennials, (15–)20–50(–70) cm (rhizomes branched, ± woody). | Perennials, (30–)40–80 cm (rhizomes stout). |
Herbage | glabrous. |
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). |
reduced distally; petiolate; blades oblanceolate to elliptic, 4–12x 1–4 cm, bases tapered, margins weakly dentate or denticulate (denticles callous; mid leaves similar, smaller; distal leaves bractlike). |
Ray florets | ± 8 or ± 13; corolla laminae 5–12 mm. |
± 13; corolla laminae 6–10 mm. |
Phyllaries | (± 8) ± 13 or ± 21, 5–9 mm, tips black (villous). |
(± 13) ± 21, 3–7 mm, tips black or brownish. |
Calyculi | of (1–)3–6 linear to filiform bractlets (lengths to 1/3 phyllaries). |
of 1–5 bractlets (longest 2–3 mm). |
Heads | (1–)4–12 in corymbiform arrays. |
(3–)5–24 in corymbiform arrays. |
Cypselae | glabrous. |
usually hairy, sometimes glabrous. |
2n | = 40. |
= 40. |
Senecio crassulus |
Senecio sphaerocephalus |
|
Phenology | Flowering summer. | Flowering spring–early summer. |
Habitat | Moist to drying hillsides, meadows, other open places in forest associations | Open meadows, especially in coniferous associations |
Elevation | 2200–3700 m (7200–12100 ft) | 1000–1800 m (3300–5900 ft) |
Distribution |
CO; ID; MT; NM; NV; OR; SD; UT; WY
|
ID; MT; NV; OR; UT; WY
|
Source | FNA vol. 20, p. 551. | FNA vol. 20, p. 555. |
Parent taxa | Asteraceae > tribe Senecioneae > Senecio | Asteraceae > tribe Senecioneae > Senecio |
Sibling taxa | ||
Synonyms | S. lapathifolius, S. semiamplexicaulis | S. altus, S. latus, S. lugens var. hookeri |
Name authority | A. Gray: Proc. Amer. Acad. Arts 19: 54. (1883) | Greene: Pittonia 3: 106. (1896) |
Web links |