Flora of North America species comparison

glabrous or sparsely and unevenly tomentose when young.

tomentose, unevenly glabrescent.

usually 1.

single.

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).

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.

± 13;

corolla laminae 6–10 mm.

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

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

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

of 1–5 bractlets (longest 2–3 mm).

8–20 in loose, corymbiform arrays.

(3–)5–24 in corymbiform arrays.

usually sparsely hairy, sometimes nearly glabrous.

usually hairy, sometimes glabrous.

= 40.

= 40.