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 1/3–2/3 of each stem;

blades of undivided cauline leaves ± ovate, margins denticulate (sometimes ± ciliate), midribs usually piloso-setose.

9–10(–12) mm.

12–18+ mm.

12–20;

corollas yellow, usually deliquescent.

12–24+;

corollas usually yellow, sometimes drying bluish, usually deliquescent.

usually reflexed in fruit.

usually reflexed in fruit.

in paniculiform arrays.

in corymbiform to 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, ± flattened, elliptic, 4.5–5+ mm, beaks ± filiform, 2.5–3.5 mm, faces 1(–3)-nerved;

pappi white, 6.5–8(–10+) mm.

= 18.

= 34.