Flora of North America species comparison

sparsely and unevenly tomentose, glabrescent except in leaf axils and among heads.

tomentose, unevenly glabrescent.

(often purplish-tinged) usually single, sometimes loosely clustered.

single.

± evenly distributed (basal often withering before flowering); petiolate (sometimes obscurely);

blades ovate to broadly ovate (usually 1–3-pinnate, lobes mostly obovate to spatulate), (4–)7–20(–30) × (1–)2–5(–12) cm, bases usually tapered, ultimate margins dentate (distal leaves similar, smaller).

reduced distally; petiolate;

blades oblanceolate to elliptic, 4–12x 1–4 cm, bases tapered, margins weakly dentate or denticulate (denticles callous; mid leaves similar, smaller; distal leaves bractlike).

± 13;

corolla laminae 8–12 mm.

± 13;

corolla laminae 6–10 mm.

± 13, 3–4(–5) mm, tips black or greenish.

(± 13) ± 21, 3–7 mm, tips black or brownish.

of 2–6 (inconspicuous) bractlets (less than 2 mm).

of 1–5 bractlets (longest 2–3 mm).

(10–)20–60+ in corymbiform arrays.

(3–)5–24 in corymbiform arrays.

all sparsely hairy or ray cypselae glabrous.

usually hairy, sometimes glabrous.

= 40.

= 40.