Flora of North America species comparison

glabrous or sparsely floccose-tomentose when young.

glabrous or sparsely tomentose (especially distally).

single or loosely clustered.

usually 1 (relatively thin, delicate).

evenly distributed; petiolate;

blades narrowly triangular, (3–)4–10+ × 2–6 cm, bases usually ± truncate, sometimes tapered, margins usually dentate, rarely subentire (distal leaves subsessile, smaller).

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).

± 8;

corolla laminae 9–15 mm.

0 or 1–5;

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

(± 8) ± 13 (± 21), 6–10 mm, tips usually green, rarely black.

± 8 or ± 13, 5–6 mm, tips greenish.

of 2–6 bractlets (rarely more than 2 mm).

0 or of 1–3+ lance-deltate bractlets.

10–30(–60) in corymbiform to subracemiform arrays.

4–10+ in open, cymiform arrays.

glabrous.

densely hairy.

= 40, 80.

= 40.