Flora of North America species comparison

glabrous or sparsely tomentose (especially distally).

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

usually 1 (relatively thin, delicate).

single or 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;

petiolate;

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

0 or 1–5;

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

usually ± 13, sometimes fewer or 0;

corolla laminae 8–12 mm.

± 8 or ± 13, 5–6 mm, tips greenish.

± 13 or ± 21, 7–10 mm, tips green.

0 or of 1–3+ lance-deltate bractlets.

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

4–10+ in open, cymiform arrays.

1(–5).

densely hairy.

glabrous.

= 40.

= 40.