Flora of North America species comparison

glabrous or sparsely and unevenly tomentose when young.

glabrous or sparsely tomentose (especially distally).

usually 1.

usually 1 (relatively thin, delicate).

evenly distributed; petiolate;

blades ovate to oblanceolate, 2–10 × 0.5–2(–4) cm, bases tapered, margins lobulate to dentate, ultimate margins often secondarily dentate to denticulate (distal leaves sessile).

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).

0.

0 or 1–5;

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

± 21, 4–6 mm, tips usually green, sometimes black.

± 8 or ± 13, 5–6 mm, tips greenish.

of 2–4(–6+) bractlets (prominent, black-tipped, lengths about 1/4 phyllaries).

0 or of 1–3+ lance-deltate bractlets.

8–20 in loose, corymbiform arrays.

4–10+ in open, cymiform arrays.

usually sparsely hairy, sometimes nearly glabrous.

densely hairy.

= 40.

= 40.