Flora of North America species comparison

1, glabrous or leaf axils sparsely tomentose.

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

(and proximal cauline) petiolate;

blades narrowly ovate to oblong-lanceolate, 30–70+ × 10–20+ mm, bases abruptly contracted to subcordate, margins usually serrate-dentate, sometimes subcrenate (apices acute).

(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 (± sessile; lacerate to subcrenate).

abruptly reduced (becoming sessile, bractlike).

bracteate, glabrous.

ebracteate, glabrous.

8–13;

corolla laminae 4–7 mm.

(0) or 8–13;

corolla laminae 7–9 mm.

50–70+;

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

35–50+;

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

13 or 21, light green (tips sometimes black), 5–8 mm, glabrous.

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

conspicuous.

inconspicuous.

8–20+ in loose, corymbiform arrays.

1–2(–4).

1–1.5 mm, glabrous;

pappi 5–5.5 mm.

1–2 mm, glabrous;

pappi 3–4.5 mm.

= 44.