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 1/2–3/4 of each stem;

blades of undivided cauline leaves ovate to orbiculate, margins entire or denticulate, seldom prickly, midribs rarely prickly-setose.

9–10(–12) mm.

8–13+ mm.

12–20;

corollas yellow, usually deliquescent.

7–15(–30+);

corollas yellow (sometimes streaked with violet), usually deliquescent.

usually reflexed in fruit.

usually erect in fruit.

in paniculiform arrays.

usually in corymbiform, sometimes 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 pale grayish to whitish or tan, ± flattened, obovate, 3–4 mm, beaks ± filiform, 3–5 mm, faces 5–9-nerved;

pappi white, 3.5–4+ mm.

= 18.

= 18.