Parthenium incanum
Parthenium ligulatum
mariola
Colorado feverfew
blades oval-elliptic to obovate, 15–25(–40+) × 6–15(–25+) mm, sometimes pinnately (3–)5–7-lobed or round-toothed, ultimate margins entire, faces tomentose (gray to white) and gland-dotted.
blades oblanceolate to spatulate, 5–18+ × 1–2(–4+) mm, margins entire, faces strigilloso-sericeous (gray) and obscurely gland-dotted.
1–3+ mm.
0–4 mm.
5;
corolla laminae ovate, 1–1.5 mm.
5;
corolla laminae oval to elliptic, 1–2 mm, retuse.
8–20(–30+).
15–25+.
outer 5 oblong, 1.5–2 mm, inner 5 orbiculate, 2–2.5 mm.
outer 5 ± ovate, 2.5–3 mm, inner 5 ± orbiculate, 3–4+ mm.
radiate, in glomerules of 3–5+ on branched stalks 1–5(–12+) cm, forming compound, corymbiform arrays.
radiate, borne singly.
obovoid, 1.5–2 mm; pappus-like enations 2(–3), erect to spreading, ± subulate, 0.5–1 mm.
oblanceoloid to pyriform, 3.5–4 mm; pappus-like enations 2, erect to spreading, ± subulate, 0.5–1 mm (a third, ± subulate element sometimes at apex of adaxial face).
= 54.
= 36, 72.
CalFlora
WildflowerSearch
iNaturalist
USDA Plants Database
