Flora of North America species comparison

usually simple, sometimes branched distally.

(forming clumps) simple or branched among heads.

2–4(–6) pairs, cauline (basal leaves often persistent on sterile rosettes), petiolate (proximal, petioles relatively short, broadly winged) or sessile (mid and distal);

blades lance-elliptic to ovate, 2–10 × 1–6 cm, margins serrate to dentate, apices obtuse to acute, faces glabrous or sparsely villous.

(2–)3(–4) pairs, mostly cauline (basal sometimes present); petiolate (petioles relatively short, broad-winged) or subsessile;

blades broadly elliptic, lance-elliptic, or narrowly to broadly lanceolate, 4–20 × 1–4 cm, margins entire or irregularly denticulate, apices acute, faces sparsely to moderately hairy (hairs relatively short to long, stipitate glands or soft, silky).

narrowly turbinate.

hemispheric to campanulate.

8–15;

corollas yellow.

10–22;

corollas yellow.

20–90;

corollas yellow;

anthers yellow.

corollas yellow;

anthers yellow.

8–20, lanceolate to oblanceolate.

10–22, usually broadly lanceolate, rarely narrowly lanceolate or oblanceolate.

1 or 3–5(–9).

1 or 3–7.

dark brown, 5–9 mm, sparsely villous;

pappi white, bristles barbellate.

grayish brown to black, 4–8 mm, mostly stipitate-glandular, sparsely hirsutulous (hairs white to brownish, simple or bifid);

pappi tawny, bristles plumose (with deep, amberlike deposits).

= 38, 76.

= 38, 57, 76, 95, 114, 133, 152.