Flora of North America species comparison

(sometimes purple-tinged) floccose-tomentose (persistently on abaxial faces of leaves, glabrescent elsewhere).

sparsely pubescent to tomentose (especially on abaxial leaf faces and among heads).

single or loosely clustered.

single or loosely clustered.

± evenly distributed;

petiolate;

blades oblanceolate to ovate, (1–)2–6 × 1–2.5 cm, bases tapered, margins dentate or incised to subpinnatifid (distal leaves bractlike).

progressively reduced distally;

petiolate;

blades triangular, triangular-lanceolate, or lanceolate, 3–10(–15) × 1.5–4 cm, bases cordate to truncate or tapered, margins serrate or dentate (mid and distal leaves sessile, bractlike).

usually ± 13, sometimes fewer or 0;

corolla laminae 8–12 mm.

0.

± 13 or ± 21, 7–10 mm, tips green.

± 8, 6–9 mm, tips green.

of 2–5 lance-linear bractlets (lengths 1/3–2/3 phyllaries).

of 2–5+ lance-deltate to filiform bractlets (lengths 1/5–1/2 phyllaries).

1(–5).

nodding, 6–10+ in racemiform-paniculiform arrays.

glabrous.

glabrous.

= 40.