Flora of North America species comparison

glabrous or sparsely and unevenly tomentose when young.

densely lanate-tomentose, glabrescent (especially on adaxial faces of leaves).

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).

mostly basal; petiolate;

blades narrowly obovate, (2–)3–7(–10) × 1–2(–3+) cm, bases tapered, margins subentire to denticulate (cauline leaves bractlike).

0.

± 13;

corolla laminae usually 8–10 mm (sometimes tubular, unexpanded, heads then perhaps technically disciform).

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

± 21, 8–12 mm, tips greenish (with white bristles).

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

of (1–)5–8+ linear to filiform bractlets (lengths 1/3–3/4 phyllaries).

8–20 in loose, corymbiform arrays.

1(–3).

usually sparsely hairy, sometimes nearly glabrous.

hairy.

= 40.