Flora of North America species comparison

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

usually 1 (sometimes more, clustered), glaucous.

(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 cauline, relatively thick and turgid) petiolate;

blades lanceolate to narrowly oblanceolate, 30–100+ × 10–20+ mm, bases tapering, margins entire or subentire.

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

gradually reduced (sessile and weakly clasping; lanceolate, entire).

conspicuously bracteate, usually hairy.

conspicuously bracteate, glaucous.

(5–)8 or 13;

corolla laminae 4–10 mm.

8–10(–13);

corolla laminae 5–7 mm.

40–60+;

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

25–40+;

corolla tubes 2–3 mm, limbs 3–4 mm.

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

(13) 21, green (tips often purple), glabrous.

conspicuous.

conspicuous.

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

12–20+ in open, corymbiform arrays.

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

pappi 5–6+ mm.

1–1.5 mm, glabrous;

pappi 5–6 mm.

= 44, 46, 92.

= 46.