Flora of North America species comparison

1, glabrous or leaf axils tomentose.

usually 1, rarely 2–3, clustered, glabrous.

(and proximal cauline) petiolate;

blades spatulate to obovate (pinnately lobed, terminal lobes ovate to oblong, lateral lobes 2–6+ pairs, smaller, midribs narrowly winged), 100–300+ × 20–50(–80+) mm, bases contracted to tapering, ultimate margins crenate or dentate to lacerate (faces glabrous).

(and proximal cauline) petiolate (petioles narrow);

blades narrowly lanceolate or ovate to oblong-ovate, 20–60+ × 10–40+ mm, bases abruptly contracted to tapering, margins subentire to crenate-dentate.

gradually reduced (petiolate or sessile; obovate, irregularly incised to subpinnate, terminal lobes narrow).

gradually reduced (sessile, weakly clasping; lanceolate to oblong or sublyrate, often pinnately lobed).

usually ebracteate (rarely with 1–2 bractlets), glabrous.

ebracteate or bracteate (bractlets inconspicuous), glabrous.

8–10+;

corolla laminae 10–15+ mm.

8 or 13;

corolla laminae (deep yellow to orange-red) 6–8+ mm.

45–60+;

corolla tubes 3–3.5 mm, limbs 4–4.5 mm.

60–80+;

corolla tubes 4.5–5.5 mm, limbs 2.5–3.5 mm.

13 or 21, green, 7–9+ mm, glabrous.

13 or 21, light green (or tips cyanic), 4–8 mm, glabrous.

inconspicuous.

0 or inconspicuous.

15–50+ in corymbiform arrays.

7–15+ in open, corymbiform arrays.

2–2.5 mm, glabrous;

pappi 6–7 mm.

1–1.5 mm, glabrous;

pappi 3–5 mm.

= 46.

= 46.