Flora of North America species comparison

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

usually 1, sometimes 2–4, clustered, glabrous or sparsely tomentose proximally.

(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.

petiolate;

blades usually broadly lanceolate to ovate, sometimes subhastate, 20–50+ × 20–40+ mm, bases truncate to subcordate or obtuse, margins crenate, denticulate, bluntly dentate, or sharply dentate (proximal cauline leaves petiolate; margins usually pinnately lobed to laciniate, sometimes subentire).

gradually reduced (weakly clasping, similar to basal).

gradually reduced (becoming sessile, sometimes clasping).

bracteate, glabrous or bases tomentose.

bracteate, glabrous.

(8–)13;

corolla laminae 7–9 mm.

0, 8, or 13;

corolla laminae 6–10+ mm.

35–50+;

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

70–80+;

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

(13–)21, green, 5–7 mm, glabrous.

(13–)21(–30+), light green, 3–8 mm, glabrous.

conspicuous (bractlets 2.5–4 mm).

inconspicuous.

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

5–20+ in open or congested, subumbelliform arrays.

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

pappi 3–4 mm.

1–1.5 mm, glabrous;

pappi 4.5–5.5 mm.

= 46.

= 40, 44, 46, 80.