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arrow-leaf groundsel, arrow-leaf ragwort, arrowleaf butterweed, groundsel
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common groundsel, common ragwort, old-man-in-the-spring
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| Perennials, (20–)50–120(–200) cm (caudices branched, ± woody). |
Annuals, (10–)20–50(–60+) cm (taprooted). |
glabrous or sparsely floccose-tomentose when young. |
glabrous or sparsely and unevenly tomentose when young. |
single or loosely clustered. |
usually 1. |
evenly distributed; petiolate; blades narrowly triangular, (3–)4–10+ × 2–6 cm, bases usually ± truncate, sometimes tapered, margins usually dentate, rarely subentire (distal leaves subsessile, smaller). |
evenly distributed; petiolate; blades ovate to oblanceolate, 2–10 × 0.5–2(–4) cm, bases tapered, margins lobulate to dentate, ultimate margins often secondarily dentate to denticulate (distal leaves sessile). |
± 8; corolla laminae 9–15 mm. |
0. |
(± 8) ± 13 (± 21), 6–10 mm, tips usually green, rarely black. |
± 21, 4–6 mm, tips usually green, sometimes black. |
of 2–6 bractlets (rarely more than 2 mm). |
of 2–4(–6+) bractlets (prominent, black-tipped, lengths about 1/4 phyllaries). |
10–30(–60) in corymbiform to subracemiform arrays. |
8–20 in loose, corymbiform arrays. |
glabrous. |
usually sparsely hairy, sometimes nearly glabrous. |
= 40, 80. |
= 40. |
|
|
|
|
| Flowering summer. |
Flowering early spring (through summer in far North). |
| Damp places, open woodlands, especially rocky stream banks in coniferous forests |
Disturbed sites |
| 100–3300 m (300–10800 ft) |
1–1000 m (0–3300 ft) |
|
AK; AZ; CA; CO; ID; MT; NM; NV; OR; WA; WY; AB; BC; NT; YT; PH
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AK; AL; AZ; CA; CO; CT; DC; DE; FL; GA; IA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; MT; NC; ND; NE; NH; NJ; NV; OH; OK; OR; PA; RI; SC; SD; TN; TX; UT; VA; VT; WA; WI; WV; WY; AB; BC; MB; NB; NL; NS; NT; NU; ON; PE; QC; SK; YT; SPM; Greenland; Eurasia [Probably introduced]
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Plants of Senecio triangularis with narrow, subentire leaves that taper to the petioles are occasionally encountered in acid bogs in Oregon and Washington and less frequently elsewhere. They are regarded as edaphic variants; they have been recognized as var. angustifolius. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Senecio vulgaris has not been collected in the Canadian Arctic north of Hudson Bay. A widely scattered weed of Eurasian origin, Senecio vulgaris is particularly abundant in southern areas of cool damp winters or northern areas of cool damp summers. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
| FNA vol. 20, p. 566. |
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. sacramentanus, S. scorzonella, S. serra, S. sheldonensis, S. soldanella, S. spartioides, S. sphaerocephalus, S. spribillei, S. squalidus, S. sylvaticus, S. taraxacoides, 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. viscosus, S. warnockii, S. wootonii |
| S. gibbonsii, S. saliens, S. triangularis var. angustifolius |
|
| Hooker: Fl. Bor.-Amer. 1: 332, plate 115. (1834) |
Linnaeus: Sp. Pl. 2: 867. (1753) |
| - Local floras:
 BC,  CA,  OR,  WA
- Local Web sites: CalFlora, CalPhotos,
 Flora NW,  Go Botany,  IL Wildflowers,  KS Wildflowers,  LA Plants,  MD Biodiversity,  MI Flora,  MN Wildflowers,  MO Plants,  PNW Herbaria, Turner Photog.
 WildflowerSearch iNaturalist (observations) USDA Plants Database- LBJ Wildflower Center
- SEINet
- Plants of the World Online
- Encyclopedia of Life
- Wikipedia
- Google Image Search
|
SW CO Wildflowers
