Flora of North America species comparison

(often sea-green, usually glaucous) glabrous.

usually floccose-tomentose to glabrescent, sometimes glabrous.

single or 2–4 loosely clustered.

single or loosely clustered.

progressively reduced distally; ± petiolate;

blades elliptic to oblanceolate, 5–20+ × (1–)2–10 cm, bases tapered, margins denticulate or entire (mid and distal leaves sessile, bractlike).

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).

(0) ca. 5;

corolla laminae 3–5 mm.

0.

± 8 or ± 13, 5–8 mm, tips frequently black.

± 13 or ± 21, 6–12 mm, tips green.

of 2–4+ bractlets (less than 2 mm).

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

20–40(–80+) in compound corymbiform arrays.

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

glabrous.

glabrous.

= 40.

= 40.