Flora of North America species comparison

1 or 2–5+, clustered, lanate- or arachno-tomentose or glabrescent.

1, sparsely to densely tomentose or glabrescent.

(often abaxially cyanic) petiolate (petioles hairy to glabrate);

blades ovate to lanceolate or narrowly lanceolate, 20–60+ × 10–30+ mm, bases abruptly contracted to tapering, margins subentire or denticulate to subserrate (abaxial faces usually tomentose, adaxials frequently glabrate).

(and proximal) petiolate;

blades lanceolate to oblanceolate, 30–50+ × 10–20 mm, bases tapering, margins entire or shallowly toothed (slightly revolute).

gradually or abruptly reduced (proximal petiolate, similar to basals; mids and distals sessile, lanceolate, entire).

gradually reduced (distal sessile, bractlike).

conspicuously bracteate, usually hairy.

inconspicuously bracteate or ebracteate, sparsely tomentose to glabrate.

(5–)8 or 13;

corolla laminae 4–10 mm.

8(–13);

corolla laminae 8–10+ mm.

40–60+;

corolla tubes 1.5–2.5 mm, limbs 3.5–4.5 mm.

30–40+;

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

13 or 21, green or yellowish, 4–7+ mm, tomentose to glabrescent.

13 or 21, green, 5–7+ mm, glabrous.

conspicuous.

0 or inconspicuous.

3–20+ in open or compact, corymbiform to subumbelliform arrays (subtended by smaller arrays arising from leaf axils).

6–15+ in corymbiform arrays.

1.5–2.5 mm, usually hirtellous on ribs, sometimes glabrous;

pappi 5–6+ mm.

1.5–2 mm, glabrous;

pappi 4–5 mm.

= 44, 46, 92.

= 46, 92.