|
mountain meadow butterweed, thick-leaf groundsel, thick-leaf ragwort
|
stickly groundsel, sticky ragwort
|
| Perennials, (15–)20–50(–70) cm (rhizomes branched, ± woody). |
Annuals, (10–)20–40(–60) cm (taprooted). |
glabrous. |
densely fetid-viscid (hairs glandular). |
1–(2–4). |
single. |
(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; blades obovate to oblong (pinnately dissected to pinnatifid), 2–7 × 1.5–4 cm, bases tapered or ± truncate, ultimate margins wavy or crenate-dentate (distal leaves sessile, smaller, ± clasping). |
± 8 or ± 13; corolla laminae 5–12 mm. |
± 13; corolla laminae 1–2 mm (usually coiled, scarcely surpassing phyllaries). |
(± 8) ± 13 or ± 21, 5–9 mm, tips black (villous). |
(± 13) ± 21, 5–7 mm, tips black. |
of (1–)3–6 linear to filiform bractlets (lengths to 1/3 phyllaries). |
of 2–5 bractlets (largest to 4 mm). |
(1–)4–12 in corymbiform arrays. |
(1–)3–8(–30) in irregular, corymbiform arrays. |
glabrous. |
usually glabrous, sometimes hairy. |
= 40. |
= 40. |
|
|
|
|
| Flowering summer. |
Flowering spring–fall. |
| Moist to drying hillsides, meadows, other open places in forest associations |
Disturbed sites, especially open sandy or gravelly places |
| 2200–3700 m (7200–12100 ft) |
1–300 m (0–1000 ft) |
|
CO; ID; MT; NM; NV; OR; SD; UT; WY
|
CT; IL; MA; ME; MN; NH; NJ; NY; PA; RI; WI; AB; BC; MB; NB; NF; NS; ON; PE; QC; SK; SPM; Eurasia [Introduced in North America]
|
|
Senecio viscosus is a smelly, Eurasian weed now widely scattered in areas of cool damp climates, often as a casual waif. The viscid hairs trap wind-blown particles of sand, dust, and soot, which give the surfaces varying textures and colors. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
| FNA vol. 20, p. 551. |
FNA vol. 20, p. 562. |
| 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. squalidus, S. sylvaticus, S. taraxacoides, S. triangularis, S. vulgaris, S. warnockii, S. wootonii |
| S. lapathifolius, S. semiamplexicaulis |
|
| A. Gray: Proc. Amer. Acad. Arts 19: 54. (1883) |
Linnaeus: Sp. Pl. 2: 868. (1753) |
| |
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