Flora of North America species comparison

glabrous or sparsely tomentose (especially distally).

floccose-tomentose to canescent, sometimes unevenly glabrescent.

usually 1 (relatively thin, delicate).

1–(2–5).

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).

progressively reduced distally;

petiolate;

blades oblong-ovate to oblanceolate, (5–)10–30 × 1.5–4(–6) cm, bases tapered, margins dentate (denticles, dark, callous; mid leaves similar, sessile, smaller; distal leaves bractlike).

0 or 1–5;

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

(± 3) ± 5;

corolla laminae 5–8 mm.

± 8 or ± 13, 5–6 mm, tips greenish.

(± 5) ± 8, 6–8 mm, tips black.

0 or of 1–3+ lance-deltate bractlets.

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

4–10+ in open, cymiform arrays.

20–60+ in corymbiform or subpaniculiform arrays.

densely hairy.

glabrous.

= 40.

= 40. (A report of 2n = 46 is presumably erroneous.)