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mountain meadow butterweed, thick-leaf groundsel, thick-leaf ragwort
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California butterweed, California ragwort
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| Perennials, (15–)20–50(–70) cm (rhizomes branched, ± woody). |
Annuals, (5–)10–30(–50+) cm (taprooted). |
glabrous. |
glabrous or sparsely tomentose. |
1–(2–4). |
usually single (erect), sometimes 2–6 (branching from bases, arching upward). |
(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). |
(sometimes subsucculent) evenly distributed; ± petiolate (proximal); blades linear-lanceolate to lanceolate 2–5(–7+) × 0.5–2(–3+) cm, bases tapered, margins subpinnatifid to dentate or subentire (mid and distal leaves sessile, bases clasping). |
± 8 or ± 13; corolla laminae 5–12 mm. |
± 13; corolla laminae 8–11 mm. |
(± 8) ± 13 or ± 21, 5–9 mm, tips black (villous). |
± 21 (sometimes fewer), 5–7(–8) mm, tips black. |
of (1–)3–6 linear to filiform bractlets (lengths to 1/3 phyllaries). |
of 5–8+ lanceolate to lance-linear or filiform bractlets (0.5–3 mm, usually inconspicuous). |
(1–)4–12 in corymbiform arrays. |
usually 3–10(–20+) in open, cymiform arrays, sometimes borne singly (depauperate plants). |
glabrous. |
hirtellous-strigose. |
= 40. |
= 40. |
|
|
|
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| Flowering summer. |
Flowering late winter–spring. |
| Moist to drying hillsides, meadows, other open places in forest associations |
Sandy, dry or drying sites, especially near coast |
| 2200–3700 m (7200–12100 ft) |
0–1200 m (0–3900 ft) |
|
CO; ID; MT; NM; NV; OR; SD; UT; WY
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CA; Mexico
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Dwarfish, subsucculent plants of Senecio californicus from near the coast have been recognized as S. ammophilus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
| FNA vol. 20, p. 551. |
FNA vol. 20, p. 561. |
| Asteraceae > tribe Senecioneae > Senecio |
Asteraceae > tribe Senecioneae > Senecio |
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. 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. 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. lapathifolius, S. semiamplexicaulis |
S. ammophilus, S. californicus var. ammophilus, S. coronopus |
| A. Gray: Proc. Amer. Acad. Arts 19: 54. (1883) |
de Candolle: in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 6: 426. (1838) |
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