Flora of North America species comparison

on proximal 1/2–3/4 of each stem;

blades of undivided cauline leaves usually ± oblong, sometimes obovate to lanceolate, margins denticulate, usually prickly, midribs usually prickly-setose, rarely smooth.

on proximal 2/3–3/4 of each stem;

blades of undivided cauline leaves ovate to lanceolate, margins entire or denticulate, midribs sometimes sparsely piloso-setose.

9–10(–12) mm.

7–12+ mm.

12–20;

corollas yellow, usually deliquescent.

(15–)20–30(–50+);

corollas bluish or whitish, sometimes yellowish, seldom deliquescent.

usually reflexed in fruit.

usually reflexed in fruit.

in paniculiform arrays.

in paniculiform arrays.

bodies pale grayish to tan, ± flattened, oblanceolate, 2.5–3.5 mm, beaks ± filiform, 2.5–4 mm, faces (3–)5–9-nerved;

pappi white, (3–)4–5 mm.

bodies brown (often mottled), ± compressed-ellipsoid, 4–5+ mm, beaks ± stout, 0.1–0.5+ mm, faces (4–)5–6-nerved;

pappi ± fuscous, 4–6+ mm.

= 18.

= 34.