Flora of North America species comparison

glabrous.

usually floccose-tomentose to glabrescent, sometimes glabrous.

1–(2–4).

single or loosely clustered.

(thickish-turgid) progressively reduced distally; petiolate;

blades broadly lanceolate to subelliptic, 2.5–15 × 1–5 cm, bases tapered, margins sharply dentate to subentire (some teeth callous; mid leaves sometimes larger than proximal; distal leaves sessile, smaller, often clasping).

progressively reduced distally; petiolate (proximal);

blades ovate to lanceolate, 7–15 × (1–)2–5 cm, bases contracted or tapered, margins subentire or serrate to dentate (mid and distal leaves similar, sessile, bractlike, often clasping).

± 8 or ± 13;

corolla laminae 5–12 mm.

0.

(± 8) ± 13 or ± 21, 5–9 mm, tips black (villous).

± 13 or ± 21, 6–12 mm, tips green.

of (1–)3–6 linear to filiform bractlets (lengths to 1/3 phyllaries).

of 4–10 linear bractlets (lengths mostly 1/3–1/2 phyllaries, sometimes 1 or 2 equaling phyllaries).

(1–)4–12 in corymbiform arrays.

nodding (especially when young), (1–)3–12(–20) in racemiform or paniculiform arrays (terminal heads often largest).

glabrous.

glabrous.

= 40.

= 40.