Senecio lugens
Senecio erucifolius
black-tip groundsel, small blacktip ragwort
hoary ragwort
loosely, often unevenly, floccose-tomentose, glabrescent.
floccose-tomentose, unevenly glabrescent (persistently hairy on abaxial leaf faces).
single or clustered.
usually single, sometimes loosely clustered.
reduced distally; petiolate;
blades narrowly obovate to oblanceolate, (4–)8–18(–25) cm, bases tapered, margins subentire to dentate (denticles callous; mid and distal leaves bractlike, clasping).
± evenly distributed (basal and proximal sometimes withering before flowering); petiolate (proximal) or sessile;
blades ovoid or oblong to spatulate (usually pinnatifid to pinnatisect, lobes ± lanceolate to linear), (3–)5–12 × (1.5–)2–4 cm, bases tapered to ± truncate, ultimate margins (often revolute) dentate or entire.
(± 5) ± 8 (± 13);
corolla laminae 8–10(–15) mm.
± 13;
corolla laminae 12–15 mm.
(± 8) ± 13 (± 21), 4–7 mm, tips black.
± 13, 5–7 mm, tips green or greenish.
of 2–5 linear bractlets (1–2 mm).
of 4–6(–10) bractlets (lengths to 1/2 phyllaries).
(2–)7–12(–20+) in corymbiform arrays.
20–60 in corymbiform arrays.
glabrous.
hairy.
= 40, 80.
Senecio lugens
Senecio erucifolius
Senecio lugens varies greatly in robustness across its range. It is scattered widely in the Rocky Mountain uplift and adjacent regions from northern Wyoming to Alaska; it is disjunct in the Olympic Peninsula, Washington. Superficially similar to S. integerrimus, S. lugens has well-developed, coarse, spreading rootstocks with branching roots; S. integerrimus arises from foreshortened, buttonlike caudices with abundant unbranched, fleshy-fibrous roots.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Senecio erucifolius has been introduced occasionally around seaports and has persisted. At present, it appears to be uncommon and highly localized; it should be expected almost any place that its close relative, Senecio jacobaea, occurs.
Senecio erucifolius was treated in Jacobaea by E. Wiebe (2000); see discussion under 53. S. jacobaea.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
BC
WA
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
