Flora of North America species comparison

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

1 (striated, frequently hollow, often pink- to purple-tinged), glabrous or leaf axils sparsely tomentose.

(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.

(and proximal cauline) obscurely petiolate;

blades obovate to oblanceolate, sometimes lyrate (lateral lobes to 5 pairs, terminal lobes larger than laterals), 50–150+ × 10–30+ mm, bases tapering, ultimate margins crenate to irregularly undulate.

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

gradually reduced (weakly clasping, similar to basal).

ebracteate or bracteate (bractlets inconspicuous), glabrous.

bracteate, glabrous or bases tomentose.

8 or 13;

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

(8–)13;

corolla laminae 7–9 mm.

60–80+;

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

35–50+;

corolla tubes 2.5–3.5 mm, limbs 2–3 mm.

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

(13–)21, green, 5–7 mm, glabrous.

0 or inconspicuous.

conspicuous (bractlets 2.5–4 mm).

7–15+ in open, corymbiform arrays.

8–30+ in umbelliform or cymiform arrays (robust plants with multiple arrays).

1–1.5 mm, glabrous;

pappi 3–5 mm.

1–1.5 mm, sparsely hirtellous on ribs or glabrous;

pappi 3–4 mm.

= 46.

= 46.