Senecio sylvaticus |
Senecio soldanella |
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heath groundsel, wood groundsel, woodland groundsel, woodland ragwort |
Colorado ragwort |
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Habit | Annuals, (15–)30–80+ cm (taproots fibrous-rooted). | Perennials, 5–15(–20) cm (caudices branched, fibrous-rooted, roots fleshy). |
Herbage | puberulent (hairs abundant, curly). |
glabrous (or with hairs on peduncles). |
Stems | single. |
single (often purplish-tinged). |
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). |
mostly basal; petiolate (petioles ± winged, lengths 1–3+ blades); blades broadly ovate to ovate-orbiculate, (1.5–)2.5–4.5(–6) × 1.5–4(–5) cm, bases truncate or tapered, margins weakly dentate or repand-denticulate to subentire (cauline leaves smaller, bractlike). |
Ray florets | 0 or 1–8+; corolla laminae usually 1–2+ mm (barely surpassing phyllaries). |
± 13+; corolla laminae 10–14 mm. |
Phyllaries | ± 13 (± 21), 4–7+ mm, tips greenish or minutely black. |
± 21, (8–)10–16 mm, tips green. |
Calyculi | 0 or of 1–5+ linear to filiform bractlets. |
of 3–5+ lanceolate to lance-linear bractlets (lengths 1/2–2/3 phyllaries). |
Heads | 12–24 in corymbiform arrays. |
nodding, 1(–2). |
Cypselae | hairy (especially on angles). |
glabrous. |
2n | = 40. |
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Senecio sylvaticus |
Senecio soldanella |
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Phenology | Flowering late spring–summer (northern areas of cool, climate); winter (southern areas). | Flowering summer. |
Habitat | Mildly disturbed woodlands, open, sandy sites | Talus slopes |
Elevation | 100–300 m (300–1000 ft) | 3200–4000 m (10500–13100 ft) |
Distribution |
CA; LA; MA; MI; NJ; OH; OR; PA; WA; WI; BC; NB; NF; NS; PE; QC; Eurasia [Introduced in North America]
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CO; NM
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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.) |
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Source | FNA vol. 20, p. 563. | FNA vol. 20, p. 552. |
Parent taxa | Asteraceae > tribe Senecioneae > Senecio | Asteraceae > tribe Senecioneae > Senecio |
Sibling taxa | ||
Synonyms | Ligularia soldanella | |
Name authority | Linnaeus: Sp. Pl. 2: 868. (1753) | A. Gray: Proc. Acad. Nat. Sci. Philadelphia 15: 67. (1864) |
Web links |
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