Flora of North America species comparison

1, glabrous or sparsely tomentose.

1 (often cyanic), glabrous.

(and proximal cauline) petiolate;

blades ovate, oblanceolate, or spatulate, 10–30 × 5–20 mm, bases tapering, sometimes obtuse, margins entire, subentire, or dentate.

(relatively turgid, abaxial faces cyanic) petiolate;

blades reniform to subreniform, 5–15+ × 5–25+ mm, bases abruptly contracted to cordate, margins usually crenate, sometimes wavy.

abruptly reduced (sessile, clasping; bractlike, entire).

abruptly reduced (1–4, sessile; bractlike, entire).

bracteate (bractlets red-tinged), densely lanate-tomentose.

ebracteate, glabrous.

(8–)13;

corolla laminae 6–10+ mm.

8 or 13;

corolla laminae 8–10+ mm.

35–50+;

corolla tubes 2.5–3.5 mm, limbs 3–4 mm.

40–50+;

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

(13–)21, green (tips red or dark red), densely tomentose proximally.

13 or 21, deep red, 8–10+ mm, glabrous.

conspicuous (bractlets narrow, red-tinged).

conspicuous (bractlets often cyanic).

1–4+ in corymbiform arrays.

borne singly.

1.5–2 mm, glabrous;

pappi 5–6 mm.

1.5–2.5 mm, glabrous;

pappi 4–5.5 mm.

= 46.