Senecio sylvaticus |
Senecio parryi |
|
---|---|---|
heath groundsel, wood groundsel, woodland groundsel, woodland ragwort |
mountain ragwort |
|
Habit | Annuals, (15–)30–80+ cm (taproots fibrous-rooted). | Perennials (annuals?), 30–60(–100) cm (apparently taprooted). |
Herbage | puberulent (hairs abundant, curly). |
viscid-pubescent (reputedly notably odorous). |
Stems | single. |
single (sometimes branching). |
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 (basal and proximal sometimes withering before flowering); weakly petiolate; blades ovate or obovate to suborbiculate, spatulate, or lanceolate, 8–12 × 2–4 cm, bases tapered to truncate, margins dentate (mid and distal leaves similar, triangular-lanceolate, bases truncate, clasping). |
Ray florets | 0 or 1–8+; corolla laminae usually 1–2+ mm (barely surpassing phyllaries). |
± 13; corolla laminae 8–10(–12+) mm. |
Phyllaries | ± 13 (± 21), 4–7+ mm, tips greenish or minutely black. |
± 21, 6–7 mm, tips greenish. |
Calyculi | 0 or of 1–5+ linear to filiform bractlets. |
of 5–15+ lanceolate or linear to subulate bractlets (lengths 1/3–7/8+ phyllaries). |
Heads | 12–24 in corymbiform arrays. |
12–30 in corymbiform arrays. |
Cypselae | hairy (especially on angles). |
hairy. |
2n | = 40. |
|
Senecio sylvaticus |
Senecio parryi |
|
Phenology | Flowering late spring–summer (northern areas of cool, climate); winter (southern areas). | Flowering late summer–fall. |
Habitat | Mildly disturbed woodlands, open, sandy sites | Rocky, disturbed sites in desert mountains |
Elevation | 100–300 m (300–1000 ft) | 1300–2300 m (4300–7500 ft) |
Distribution |
CA; LA; MA; MI; NJ; OH; OR; PA; WA; WI; BC; NB; NF; NS; PE; QC; Eurasia [Introduced in North America]
|
AZ; NM; TX; Mexico |
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.) |
Senecio parryi is infrequently collected and poorly known. In the flora, it is known from trans-Pecos Texas westward to southern Arizona. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 563. | FNA vol. 20, p. 568. |
Parent taxa | Asteraceae > tribe Senecioneae > Senecio | Asteraceae > tribe Senecioneae > Senecio |
Sibling taxa | ||
Name authority | Linnaeus: Sp. Pl. 2: 868. (1753) | A. Gray: in W. H. Emory, Rep. U.S. Mex. Bound. 2(1): 103. (1859) |
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