Senecio sylvaticus |
Senecio quaylei |
|
---|---|---|
heath groundsel, wood groundsel, woodland groundsel, woodland ragwort |
quayle's ragwort |
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Habit | Annuals, (15–)30–80+ cm (taproots fibrous-rooted). | Annuals, 80–120 cm (taproots surrounded by fibrous roots). |
Herbage | puberulent (hairs abundant, curly). |
glabrous or sparsely hairy. |
Stems | single. |
single. |
Leaves | evenly distributed; petiolate; blades obovate to oblong, 3–7(–12) × 1–3(–4) cm, usually 1–2-pinnate, bases tapered, ultimate margins dentate (distal leaves similar, clasping, bractlike). |
evenly distributed; petiolate; blades ovate, 12–24 × 8–12 cm, bases tapered or contracted, margins wavy and dentate to denticulate (mid leaves sessile, ovate to broadly lanceolate, nearly as large as basal and proximal; distal sessile, lanceolate to linear-lanceolate, becoming bractlike). |
Ray florets | 0 or 1–8+; corolla laminae usually 1–2+ mm (barely surpassing phyllaries). |
± 8; corolla laminae 7–10 mm. |
Phyllaries | ± 13 (± 21), 4–7+ mm, tips greenish or minutely black. |
± 13, 7–9 mm, tips green to grayish. |
Calyculi | 0 or of 1–5+ linear to filiform bractlets. |
of 2–7 bractlets (1–3 mm). |
Heads | 12–24 in corymbiform arrays. |
20–40+ in corymbiform arrays or cymiform clusters. |
Cypselae | hairy (especially on angles). |
hirtellous. |
2n | = 40. |
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Senecio sylvaticus |
Senecio quaylei |
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Phenology | Flowering late spring–summer (northern areas of cool, climate); winter (southern areas). | Flowering spring. |
Habitat | Mildly disturbed woodlands, open, sandy sites | Open, disturbed sites, especially roadsides |
Elevation | 100–300 m (300–1000 ft) | 200–400 m (700–1300 ft) |
Distribution |
CA; LA; MA; MI; NJ; OH; OR; PA; WA; WI; BC; NB; NF; NS; PE; QC; Eurasia [Introduced in North America]
|
TX |
Discussion | Senecio sylvaticus is a Eurasian weed that favors cool, wet climates. It is well established in coastal areas of the Pacific Coast and in parts of Newfoundland and Quebec; elsewhere in the flora, it appears to be sporadic. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Senecio quaylei resembles S. ampullaceus; it is more robust and glabrous, and has prominently clasping mid-cauline leaves. The size and robustness suggest that it may be a polyploid derivative of S. ampullaceus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 563. | FNA vol. 20, p. 561. |
Parent taxa | Asteraceae > tribe Senecioneae > Senecio | Asteraceae > tribe Senecioneae > Senecio |
Sibling taxa | ||
Name authority | Linnaeus: Sp. Pl. 2: 868. (1753) | T. M. Barkley: Sida 19: 286, figs. 1, 2. (2000) |
Web links |
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