Flora of North America species comparison

glabrous or sparsely tomentose (especially distally).

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

usually 1 (relatively thin, delicate).

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

evenly distributed;

sessile;

blades oblanceolate to lance-linear, 2–4 × 0.5–1 cm, bases sometimes weakly clasping, margins usually subpinnate to dentate, sometimes subentire (distal leaves bractlike).

± 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).

0 or 1–5;

corolla laminae 0.5–1+ mm (barely surpassing phyllaries, heads perhaps technically disciform).

± 13;

corolla laminae 8–12 mm.

± 8 or ± 13, 5–6 mm, tips greenish.

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

0 or of 1–3+ lance-deltate bractlets.

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

4–10+ in open, cymiform arrays.

(10–)20–60+ in corymbiform arrays.

densely hairy.

all sparsely hairy or ray cypselae glabrous.

= 40.

= 40.