Flora of North America species comparison

glabrous or sparsely floccose-tomentose when young.

(sometimes purplish-tinged) floccose-tomentose, unevenly glabrescent.

single or loosely clustered.

single or loosely clustered (erect or arching).

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 cauline; petiolate (petioles about equaling blades);

blades lanceolate or oblanceolate to ovate, (2–)4–8+ × 1.5–3 cm, bases tapered, margins denticulate (distal leaves smaller, lanceolate or linear-lanceolate, bractlike).

± 8;

corolla laminae 9–15 mm.

± 13;

corolla laminae ± 15 mm.

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

usually ± 21, sometimes ± 13, (8–)10–15 mm, tips usually greenish (often sparsely hairy).

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

of 4–8 lanceolate to lance-linear bractlets (lengths mostly less than 1/2 phyllaries).

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

nodding, 1(–2).

glabrous.

glabrous.

= 40, 80.

= 40.