|
stickly groundsel, sticky ragwort
|
large-head groundsel, rocky ragwort
|
| Annuals, (10–)20–40(–60) cm (taprooted). |
Perennials, (15–)30–50 cm (rhizomes woody, suberect or creeping). |
densely fetid-viscid (hairs glandular). |
loosely arachno-tomentose, unevenly glabrescent. |
single. |
single or clustered. |
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). |
progressively reduced distally; weakly petiolate; blades lanceolate to narrowly oblanceolate, 10–18+ × 1–2(–3+) cm, bases tapered, margins entire or wavy (often with dark, cartilaginous denticles; mid leaves similar, smaller, sessile; distal leaves bractlike). |
± 13; corolla laminae 1–2 mm (usually coiled, scarcely surpassing phyllaries). |
± 13; corolla laminae (5–)15–20 mm. |
(± 13) ± 21, 5–7 mm, tips black. |
± 21, 9–12(–14) mm, tips not notably blackened (short-hairy). |
of 2–5 bractlets (largest to 4 mm). |
of 5–8+ linear to filiform bractlets (lengths 1/2–7/8+ phyllaries). |
(1–)3–8(–30) in irregular, corymbiform arrays. |
usually 1 (sometimes subtended by 1–2 smaller heads). |
usually glabrous, sometimes hairy. |
glabrous. |
= 40. |
= 40. |
|
|
|
|
| Flowering spring–fall. |
Flowering summer. |
| Disturbed sites, especially open sandy or gravelly places |
Rocky, moist or drying sites, especially on mountain slopes |
| 1–300 m (0–1000 ft) |
1500–2500 m (4900–8200 ft) |
|
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]
|
ID; MT; WY; AB; BC |
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. 562. |
FNA vol. 20, p. 553. |
| 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. 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. 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. 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 |
| Linnaeus: Sp. Pl. 2: 868. (1753) |
Nuttall: Trans. Amer. Philos. Soc., n. s. 7: 410. (1841) |
| |
BC
OR
WA
Flora NW
Go Botany
IL Wildflowers
MN Wildflowers
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
