Flora of North America species comparison

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

1 or 3–5, loosely clustered, glabrous or bases and leaf axils tomentose.

petiolate;

blades lanceolate to narrowly elliptic or oblanceolate, 30–60+ × 10–20+ mm, bases tapering, sometimes obtuse, margins subentire to dentate or serrate.

(and proximal cauline, relatively thick and turgid) petiolate (petioles sometimes winged);

blades elliptic-ovate or suborbiculate to spatulate, 15–25 × 5–20 mm, bases tapering, margins entire or dentate (at apices).

gradually reduced (proximals petiolate, sublyrate; mids sessile, not clasping, lanceolate, dissected, incised, or lacerate; distals sessile, bractlike).

abruptly reduced (becoming sessile, bractlike).

usually bracteate, sometimes ebracteate, glabrous.

ebracteate, glabrous.

0, 8, or 13;

corolla laminae (pale yellow) 5–10+ mm.

(0) or 8–13;

corolla laminae 7–9 mm.

50–65+;

corolla tubes 2–3 mm, limbs 2–3 mm.

35–50+;

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

13 or 21, green, 5–8+ mm, glabrous.

13, cyanic, 8–9 mm, glabrous or loosely tomentose proximally.

inconspicuous.

inconspicuous.

2–10+ in loose or compact, corymbiform arrays.

1–2(–4).

1–2 mm, usually glabrous, sometimes hispidulous on ribs;

pappi 3.5–4.5 mm.

1–2 mm, glabrous;

pappi 3–4.5 mm.

= 44, 46, 92.