Flora of North America species comparison

glabrous or with tufts of white hairs in leaf axils.

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

usually 1 (branching distally, unevenly reddish, usually somewhat lax).

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

evenly distributed;

petiolate (proximal) or sessile;

blades lanceolate to lance-linear, 3–10+ × (0.5–)1–2 cm, bases tapered (or auriculate), margins (sometimes revolute) unevenly dentate to subentire (mid and distal leaves similar, smaller, bases expanded, ± truncate to cordate, clasping).

± 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).

usually ± 8 or ± 13, rarely 0;

corolla laminae 8–10 mm.

± 13;

corolla laminae 8–12 mm.

± 21, (4–)5–8 mm, tips often with minute black dots.

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

of 3–5+ linear to subulate bractlets (to 1.5 mm).

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

4–12 in loose, corymbiform arrays.

(10–)20–60+ in corymbiform arrays.

hairy.

all sparsely hairy or ray cypselae glabrous.

= 40.