Flora of North America species comparison

glabrous or sparsely tomentose (especially distally).

unevenly villous-tomentose or floccose, glabrescent.

usually 1 (relatively thin, delicate).

single (from loosely clustered basal leaves).

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 ovate to oblanceolate, (3–)4–8(–10) × 2–3(–4) cm, bases tapered, margins shallowly dentate (mid and distal leaves smaller, bractlike, often clasping).

0 or 1–5;

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

± 8;

corolla laminae 8–15 mm.

± 8 or ± 13, 5–6 mm, tips greenish.

(± 8) ± 13, 8–10 mm, tips black (villous).

0 or of 1–3+ lance-deltate bractlets.

of 2–7 lance-linear to linear bractlets (lengths 1/3–2/3 phyllaries).

4–10+ in open, cymiform arrays.

erect or weakly nodding (especially in bud), (2–)5–9(–12) in loose, cymiform arrays.

densely hairy.

glabrous.

= 40.

= 40.