Senecio cannabifolius
Senecio erucifolius
Aleutian ragwort
hoary ragwort
unevenly tomentose, glabrescent, except persistently hairy on abaxial faces of leaves.
floccose-tomentose, unevenly glabrescent (persistently hairy on abaxial leaf faces).
single.
usually single, sometimes loosely clustered.
± evenly distributed (basal and proximal withering before flowering); mostly petiolate (proximal);
blades oblong or ovate to oblong-lanceolate (pinnately or subpalmately parted, primary lobes 3–6+, lanceolate to lance-linear, 3–8+ cm), 10–20+ × 8–15+ cm, bases ± tapered, ultimate margins serrate (distal leaves similar, sessile, smaller).
± 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;
corolla laminae ca. 10 mm.
± 13;
corolla laminae 12–15 mm.
± 13, 4–6 mm, tips green.
± 13, 5–7 mm, tips green or greenish.
0 or of 1–5+ subulate bractlets (lengths about 1/3 phyllaries).
of 4–6(–10) bractlets (lengths to 1/2 phyllaries).
20–50 in corymbiform arrays.
20–60 in corymbiform arrays.
glabrous.
hairy.
= 40.
Senecio cannabifolius
Senecio erucifolius
Senecio cannabifolius barely enters the flora from far-eastern Asia. Infraspecific taxa are recognized within S. cannabifolius in some floras of Asiatic regions; our plants are referable to var. cannabifolius.
Senecio cannabifolius has been treated in Jacobaea by E. Wiebe (2000); see discussion under 53. S. jacobaea.
(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.)
WildflowerSearch
iNaturalist
USDA Plants Database
