Flora of North America species comparison

1, glabrous or leaf axils sparsely tomentose.

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

(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).

petiolate;

blades ovate, obovate, or elliptic, 20–40+ × 10–30+ mm, bases tapering to contracted, margins subentire to crenate-dentate.

gradually reduced (± sessile; lacerate to subcrenate).

abruptly reduced (sessile, often weakly clasping, dentate to subentire; distals sessile, lanceolate, weakly clasping, entire or dentate).

bracteate, glabrous.

sparsely bracteate or ebracteate, glabrous.

8–13;

corolla laminae 4–7 mm.

13;

corolla laminae 7–12+ mm.

50–70+;

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

40–55+;

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

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

(13–)21, green (tips sometimes cyanic), 5–8+ mm, glabrous.

conspicuous.

(bractlets frequently cyanic).

8–20+ in loose, corymbiform arrays.

1(–5; sometimes subtended by 2 relatively large bractlets).

1–1.5 mm, glabrous;

pappi 5–5.5 mm.

1.5–2.5 mm, glabrous;

pappi 4–6 mm.

= 44.

= 46, 90.