Senecio sylvaticus
Senecio amplectens
heath groundsel, wood groundsel, woodland groundsel, woodland ragwort
alpine groundsel, showy alpine ragwort
puberulent (hairs abundant, curly).
(often purplish-tinged) glabrous or sparsely and unevenly hairy, especially near leaf axils and among heads, usually glabrescent.
single.
single or loosely clustered.
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).
usually progressively reduced distally (basal sometimes smaller than proximal or mid leaves); petiolate (petioles shorter than to equaling blades, often clasping);
blades broadly lanceolate or lanceolate to oblanceolate, (5–)10–20+ × 2–4(–5+) cm, bases tapered, margins dentate to denticulate (distal leaves smaller, bractlike).
0 or 1–8+;
corolla laminae usually 1–2+ mm (barely surpassing phyllaries).
usually ± 13, sometimes fewer;
corolla laminae (10–)15–25 mm.
± 13 (± 21), 4–7+ mm, tips greenish or minutely black.
± 13 or ± 21, tips often black or brownish (sometimes with scattered black hairs).
0 or of 1–5+ linear to filiform bractlets.
of 2–5+ linear to filiform bractlets (lengths to 1/2 phyllaries).
12–24 in corymbiform arrays.
nodding, 1–5(–10).
hairy (especially on angles).
glabrous.
= 40.
= 40, ca. 175–180.
Senecio sylvaticus
Senecio amplectens
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.)
Varieties 2 (2 in the flora).
The varieties of Senecio amplectens are distinguished by morphologic tendencies and habitat preferences; there are many intermediates. Where the ranges of the two overlap, var. amplectens occurs at slightly lower elevations than var. holmii.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Plants (30–)40–60+; herbage sometimes sparsely hairy; leaves mostly proximal and mid cauline; phyllaries frequently black or purplish toward tips, sometimes with black hairs on abaxial faces | var. amplectens |
1. Plants (5–)10–20(–30) cm; herbage glabrous or glabrate at flowering; leaves mostly basal and proximal; phyllaries green or light purplish, glabrous | var. holmii |
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