Senecio sylvaticus
Senecio spribillei
heath groundsel, wood groundsel, woodland groundsel, woodland ragwort
puberulent (hairs abundant, curly).
glabrous.
single.
usually single.
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).
progressively reduced distally (basal and proximal withering before flowering); petiolate (petioles purplish, weakly winged, 4–5 cm);
blades broadly triangular-ovate to suborbiculate, 2–4(–5) × 2.5–3 cm, bases truncate to ± cuneate, margins coarsely spinulose-dentate (mid leaves similar, persistent).
0 or 1–8+;
corolla laminae usually 1–2+ mm (barely surpassing phyllaries).
“few”;
corolla laminae ca. 7 mm (inconspicuous, equaling or barely surpassing phyllaries).
± 13 (± 21), 4–7+ mm, tips greenish or minutely black.
± 13, 7–9 mm, tips green.
0 or of 1–5+ linear to filiform bractlets.
of “few,” linear bractlets.
12–24 in corymbiform arrays.
nodding, 4–6.
hairy (especially on angles).
glabrous.
= 40.
Senecio sylvaticus
Senecio spribillei
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 spribillei (from Snowshoe Peak, Cabinet Mountains) is similar in aspect to S. neowebsteri of the Olympic Mountains, Washington.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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