Flora of North America species comparison

glabrous or sparsely tomentose (especially distally).

tomentose, unevenly glabrescent.

usually 1 (relatively thin, delicate).

single.

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).

reduced distally;

petiolate;

blades oblanceolate to elliptic, 4–12x 1–4 cm, bases tapered, margins weakly dentate or denticulate (denticles callous; mid leaves similar, smaller; distal leaves bractlike).

0 or 1–5;

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

± 13;

corolla laminae 6–10 mm.

± 8 or ± 13, 5–6 mm, tips greenish.

(± 13) ± 21, 3–7 mm, tips black or brownish.

0 or of 1–3+ lance-deltate bractlets.

of 1–5 bractlets (longest 2–3 mm).

4–10+ in open, cymiform arrays.

(3–)5–24 in corymbiform arrays.

densely hairy.

usually hairy, sometimes glabrous.

= 40.

= 40.