|
mountain meadow butterweed, thick-leaf groundsel, thick-leaf ragwort
|
oxford ragwort
|
| Perennials, (15–)20–50(–70) cm (rhizomes branched, ± woody). |
Annuals (or perennials), 15–60+ cm (taprooted). |
glabrous. |
sparsely, unevenly floccose to subglabrous, glabrescent. |
1–(2–4). |
single (branching distally). |
(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 (proximal, petioles ± winged); blades obovate to oblong, 4–10 × 2–4+ cm, mostly lyrate-pinnatifid to pinnate, bases tapered, ultimate margins dentate (distal leaves similar, smaller, sessile). |
± 8 or ± 13; corolla laminae 5–12 mm. |
± 13; corolla laminae 5–8 mm. |
(± 8) ± 13 or ± 21, 5–9 mm, tips black (villous). |
(± 13) ± 21, 5–6+ mm, tips black. |
of (1–)3–6 linear to filiform bractlets (lengths to 1/3 phyllaries). |
of 4–10+ bractlets (1–2+ mm). |
(1–)4–12 in corymbiform arrays. |
(3–)6–20 in open, cymiform arrays. |
glabrous. |
usually hairy. |
= 40. |
= 20. |
|
|
|
|
| Flowering summer. |
Flowering late winter–spring or fall. |
| Moist to drying hillsides, meadows, other open places in forest associations |
Disturbed sites (in regions of cool, damp climates) |
| 2200–3700 m (7200–12100 ft) |
0–300 m (0–1000 ft) |
|
CO; ID; MT; NM; NV; OR; SD; UT; WY
|
CA; NS; Europe [Introduced in North America] |
|
Senecio squalidus is native in Europe, where it is a common weed. It is apparently established in the San Francisco Bay area, California and has been reported from British Columbia, New Brunswick, and Nova Scotia. It is to be expected elsewhere. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
| FNA vol. 20, p. 551. |
FNA vol. 20, p. 560. |
| 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. 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. rapifolius, S. riddellii, S. sacramentanus, S. scorzonella, S. serra, S. sheldonensis, S. soldanella, S. spartioides, S. sphaerocephalus, S. spribillei, S. sylvaticus, S. taraxacoides, S. triangularis, S. viscosus, S. vulgaris, S. warnockii, S. wootonii |
| S. lapathifolius, S. semiamplexicaulis |
|
| A. Gray: Proc. Amer. Acad. Arts 19: 54. (1883) |
Linnaeus: Sp. Pl. 2: 869. (1753) |
| |
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