Flora of North America species comparison

glabrous or sparsely floccose-tomentose when young.

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

single or loosely clustered.

single.

evenly distributed; petiolate;

blades narrowly triangular, (3–)4–10+ × 2–6 cm, bases usually ± truncate, sometimes tapered, margins usually dentate, rarely subentire (distal leaves subsessile, smaller).

mostly basal; petiolate;

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

± 8;

corolla laminae 9–15 mm.

± 13;

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

(± 8) ± 13 (± 21), 6–10 mm, tips usually green, rarely black.

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

of 2–6 bractlets (rarely more than 2 mm).

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

10–30(–60) in corymbiform to subracemiform arrays.

1(–3).

glabrous.

hairy.

= 40, 80.