Flora of North America species comparison

1, glabrous or leaf axils sparsely tomentose.

1 (often purplish), sparsely lanate or arachno-tomentose, glabrescent.

(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 lyrate to sublyrate (midribs winged) or ovate to orbiculate, 10–20+ × 30–50+ mm, bases tapering to contracted, ultimate margins ± dentate (faces glabrate at flowering).

gradually reduced (± sessile; lacerate to subcrenate).

gradually reduced (sessile; usually bractlike and entire, sometimes larger and pinnatifid).

bracteate, glabrous.

conspicuously bracteate (bractlets red-tipped), densely lanate-tomentose.

8–13;

corolla laminae 4–7 mm.

8 or 13;

corolla laminae 5–10 mm.

50–70+;

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

30–40+;

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

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

13 or 21, purplish, 6–9 mm, sparsely tomentose.

conspicuous.

conspicuous (bractlets reddish or purple).

8–20+ in loose, corymbiform arrays.

borne singly or 2–6 in compact, cymiform arrays.

1–1.5 mm, glabrous;

pappi 5–5.5 mm.

1.5–2 mm, glabrous;

pappi 5–6 mm.

= 44.

= 46.