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mountain meadow butterweed, thick-leaf groundsel, thick-leaf ragwort

openwoods ragwort

Habit Perennials, (15–)20–50(–70) cm (rhizomes branched, ± woody). Perennials, (20–)30–60 cm (rhizomes branched, spreading or suberect).
Herbage

glabrous.

(unevenly purple-tinged, often glaucous) glabrous.

Stems

1–(2–4).

1–(2–3).

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).

progressively reduced distally; petiolate;

blades ovate to oblanceolate, 4–8(–9+) × (2–)3–5 cm, bases tapered, margins dentate to incised-dentate (some denticles callous; mid leaves similar, smaller, ± clasping; distal leaves bractlike).

Ray florets

± 8 or ± 13;

corolla laminae 5–12 mm.

0.

Phyllaries

(± 8) ± 13 or ± 21, 5–9 mm, tips black (villous).

(± 5) ± 8, 3–4(–5) mm, tips green or brownish.

Calyculi

of (1–)3–6 linear to filiform bractlets (lengths to 1/3 phyllaries).

0 or of 1–3+ lance-deltate to lance-linear bractlets (mostly less than 1 mm).

Heads

(1–)4–12 in corymbiform arrays.

25–60+ in cymiform clusters of 3–12.

Cypselae

glabrous.

glabrous.

2n

= 40.

= 40.

Senecio crassulus

Senecio rapifolius

Phenology Flowering summer. Flowering late summer–early fall.
Habitat Moist to drying hillsides, meadows, other open places in forest associations Rocky hillsides and cliffs in coniferous wooded areas
Elevation 2200–3700 m (7200–12100 ft) 1800–2800 m (5900–9200 ft)
Distribution
from FNA
CO; ID; MT; NM; NV; OR; SD; UT; WY
[WildflowerSearch map]
[BONAP county map]
from FNA
CO; ID; SD; WY
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 20, p. 551. FNA vol. 20, p. 553.
Parent taxa Asteraceae > tribe Senecioneae > Senecio Asteraceae > tribe Senecioneae > Senecio
Sibling taxa
S. actinella, S. amplectens, S. ampullaceus, S. aphanactis, S. arizonicus, S. aronicoides, S. astephanus, S. atratus, S. bigelovii, S. blochmaniae, S. californicus, S. cannabifolius, S. clarkianus, S. elegans, S. elmeri, S. eremophilus, S. ertterae, S. erucifolius, S. flaccidus, S. fremontii, S. hydrophiloides, S. hydrophilus, S. integerrimus, S. jacobaea, S. lemmonii, S. lugens, S. lyonii, S. megacephalus, S. mohavensis, S. multidentatus, S. neowebsteri, S. parryi, S. pattersonensis, S. pseudoarnica, S. pudicus, S. quaylei, S. rapifolius, S. riddellii, S. sacramentanus, S. scorzonella, S. serra, S. sheldonensis, S. soldanella, S. spartioides, S. sphaerocephalus, S. spribillei, S. squalidus, S. sylvaticus, S. taraxacoides, S. triangularis, S. viscosus, S. vulgaris, S. warnockii, S. wootonii
S. actinella, S. amplectens, S. ampullaceus, S. aphanactis, S. arizonicus, S. aronicoides, S. astephanus, S. atratus, S. bigelovii, S. blochmaniae, S. californicus, S. cannabifolius, S. clarkianus, S. crassulus, S. elegans, S. elmeri, S. eremophilus, S. ertterae, S. erucifolius, S. flaccidus, S. fremontii, S. hydrophiloides, S. hydrophilus, S. integerrimus, S. jacobaea, S. lemmonii, S. lugens, S. lyonii, S. megacephalus, S. mohavensis, S. multidentatus, S. neowebsteri, S. parryi, S. pattersonensis, S. pseudoarnica, S. pudicus, S. quaylei, S. riddellii, S. sacramentanus, S. scorzonella, S. serra, S. sheldonensis, S. soldanella, S. spartioides, S. sphaerocephalus, S. spribillei, S. squalidus, S. sylvaticus, S. taraxacoides, S. triangularis, S. viscosus, S. vulgaris, S. warnockii, S. wootonii
Synonyms S. lapathifolius, S. semiamplexicaulis
Name authority A. Gray: Proc. Amer. Acad. Arts 19: 54. (1883) Nuttall: Trans. Amer. Philos. Soc., n. s. 7: 409. (1841)
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