|
Sacramento ragwort
|
stickly groundsel, sticky ragwort
|
| Perennials, 20–50 cm (caudices fibrous-rooted). |
Annuals, (10–)20–40(–60) cm (taprooted). |
sparsely pubescent to tomentose (especially on abaxial leaf faces and among heads). |
densely fetid-viscid (hairs glandular). |
single or loosely clustered. |
single. |
progressively reduced distally; petiolate; blades triangular, triangular-lanceolate, or lanceolate, 3–10(–15) × 1.5–4 cm, bases cordate to truncate or tapered, margins serrate or dentate (mid and distal leaves sessile, bractlike). |
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). |
0. |
± 13; corolla laminae 1–2 mm (usually coiled, scarcely surpassing phyllaries). |
± 8, 6–9 mm, tips green. |
(± 13) ± 21, 5–7 mm, tips black. |
of 2–5+ lance-deltate to filiform bractlets (lengths 1/5–1/2 phyllaries). |
of 2–5 bractlets (largest to 4 mm). |
nodding, 6–10+ in racemiform-paniculiform arrays. |
(1–)3–8(–30) in irregular, corymbiform arrays. |
glabrous. |
usually glabrous, sometimes hairy. |
|
= 40. |
|
|
|
|
| Late summer. |
Flowering spring–fall. |
| Montane meadows |
Disturbed sites, especially open sandy or gravelly places |
| 3000–3500 m (9800–11500 ft) |
1–300 m (0–1000 ft) |
|
NM |
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. 550. |
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. 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. 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 |
| Wooton & Standley: Contr. U.S. Natl. Herb. 16: 194. (1913) |
Linnaeus: Sp. Pl. 2: 868. (1753) |
| |
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