Senecio sylvaticus
Senecio arizonicus
heath groundsel, wood groundsel, woodland groundsel, woodland ragwort
Arizona ragwort
puberulent (hairs abundant, curly).
lanate-arachnose or tomentose, unevenly glabrescent.
single.
1(–2).
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).
(often purplish abaxially) reduced distally; petiolate;
blades ovate to subelliptic, (5–)6–10(–15) × (2.5–)3–5(–9) cm, bases tapered or contracted, margins subentire to denticulate (denticles callous; mid and distal leaves bractlike).
0 or 1–8+;
corolla laminae usually 1–2+ mm (barely surpassing phyllaries).
± 13;
corolla laminae 5–10 mm.
± 13 (± 21), 4–7+ mm, tips greenish or minutely black.
(± 13) ± 21, 5–7 mm, tips green.
0 or of 1–5+ linear to filiform bractlets.
of 2–5+ bractlets (largest to 3 mm).
12–24 in corymbiform arrays.
(2–)5–12(–20) in corymbiform arrays.
hairy (especially on angles).
hairy (especially on angles).
= 40.
= 40.
Senecio sylvaticus
Senecio arizonicus
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 arizonicus is reputedly in southern New Mexico (W. C. Martin and C. R. Hutchins 1980); that seems unlikely and should be checked.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
- Local floras:
BC, 
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OR, 
WA - Local Web sites: CalFlora, CalPhotos,
Flora NW, 
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