Flora of North America species comparison

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

(often sea-green, usually glaucous) glabrous.

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

single or 2–4 loosely clustered.

± 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).

progressively reduced distally; ± petiolate;

blades elliptic to oblanceolate, 5–20+ × (1–)2–10 cm, bases tapered, margins denticulate or entire (mid and distal leaves sessile, bractlike).

± 13;

corolla laminae 8–12 mm.

(0) ca. 5;

corolla laminae 3–5 mm.

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

± 8 or ± 13, 5–8 mm, tips frequently black.

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

of 2–4+ bractlets (less than 2 mm).

(10–)20–60+ in corymbiform arrays.

20–40(–80+) in compound corymbiform arrays.

all sparsely hairy or ray cypselae glabrous.

glabrous.

= 40.

= 40.