Flora of North America species comparison

glabrous or sparsely floccose-tomentose when young.

glabrous.

single or loosely clustered.

usually 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).

progressively reduced distally (basal and proximal withering before flowering); petiolate (petioles purplish, weakly winged, 4–5 cm);

blades broadly triangular-ovate to suborbiculate, 2–4(–5) × 2.5–3 cm, bases truncate to ± cuneate, margins coarsely spinulose-dentate (mid leaves similar, persistent).

± 8;

corolla laminae 9–15 mm.

“few”;

corolla laminae ca. 7 mm (inconspicuous, equaling or barely surpassing phyllaries).

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

± 13, 7–9 mm, tips green.

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

of “few,” linear bractlets.

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

nodding, 4–6.

glabrous.

glabrous.

= 40, 80.