Senecio lugens |
Senecio vulgaris |
|
---|---|---|
black-tip groundsel, small blacktip ragwort |
common groundsel, common ragwort, old-man-in-the-spring |
|
Habit | Perennials, (10–)20–35(–50) cm (rhizomes suberect to creeping). | Annuals, (10–)20–50(–60+) cm (taprooted). |
Herbage | loosely, often unevenly, floccose-tomentose, glabrescent. |
glabrous or sparsely and unevenly tomentose when young. |
Stems | single or clustered. |
usually 1. |
Leaves | reduced distally; petiolate; blades narrowly obovate to oblanceolate, (4–)8–18(–25) cm, bases tapered, margins subentire to dentate (denticles callous; mid and distal leaves bractlike, clasping). |
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). |
Ray florets | (± 5) ± 8 (± 13); corolla laminae 8–10(–15) mm. |
0. |
Phyllaries | (± 8) ± 13 (± 21), 4–7 mm, tips black. |
± 21, 4–6 mm, tips usually green, sometimes black. |
Calyculi | of 2–5 linear bractlets (1–2 mm). |
of 2–4(–6+) bractlets (prominent, black-tipped, lengths about 1/4 phyllaries). |
Heads | (2–)7–12(–20+) in corymbiform arrays. |
8–20 in loose, corymbiform arrays. |
Cypselae | glabrous. |
usually sparsely hairy, sometimes nearly glabrous. |
2n | = 40, 80. |
= 40. |
Senecio lugens |
Senecio vulgaris |
|
Phenology | Flowering summer. | Flowering early spring (through summer in far North). |
Habitat | Moist meadows, gravelly streambeds, open woods in alpine or boreal sites | Disturbed sites |
Elevation | 200–2500 m (700–8200 ft) | 1–1000 m (0–3300 ft) |
Distribution |
AK; MT; WA; WY; AB; BC; NT; YT
|
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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Discussion | Senecio lugens varies greatly in robustness across its range. It is scattered widely in the Rocky Mountain uplift and adjacent regions from northern Wyoming to Alaska; it is disjunct in the Olympic Peninsula, Washington. Superficially similar to S. integerrimus, S. lugens has well-developed, coarse, spreading rootstocks with branching roots; S. integerrimus arises from foreshortened, buttonlike caudices with abundant unbranched, fleshy-fibrous roots. (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.) |
Source | FNA vol. 20, p. 554. | FNA vol. 20, p. 562. |
Parent taxa | Asteraceae > tribe Senecioneae > Senecio | Asteraceae > tribe Senecioneae > Senecio |
Sibling taxa | ||
Synonyms | S. glaucescens, S. imbricatus, S. integerrimus var. lugens | |
Name authority | Richardson: in J. Franklin et al., Narr. Journey Polar Sea, 748. (1823) | Linnaeus: Sp. Pl. 2: 867. (1753) |
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