Flora of North America species comparison

glabrous or sparsely floccose-tomentose when young.

(often sea-green, usually glaucous) glabrous.

single or loosely clustered.

single or 2–4 loosely clustered.

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).

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).

± 8;

corolla laminae 9–15 mm.

(0) ca. 5;

corolla laminae 3–5 mm.

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

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

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

of 2–4+ bractlets (less than 2 mm).

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

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

glabrous.

glabrous.

= 40, 80.

= 40.