Flora of North America species comparison

usually simple, sometimes branched.

(forming clumps) simple or branched among heads.

2–4(–6) pairs, mostly cauline (basal often persistent on sterile rosettes);

petiolate;

blades cordate or subcordate to ovate, 3–10 × 2–10 cm, margins dentate to coarsely dentate, apices acute to rounded, faces puberulent to sparsely villous, sometimes stipitate-glandular (especially adaxial).

(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).

broadly campanulate.

hemispheric to campanulate.

6–13;

corollas yellow.

10–22;

corollas yellow.

corollas yellow;

anthers yellow.

corollas yellow;

anthers yellow.

10–20, narrowly ovate to lanceolate.

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

1, or 3–5(–10).

1 or 3–7.

dark gray, 5–10 mm, sparsely to densely hirsute (hairs duplex), sometimes stipitate-glandular as well;

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, 57, 76, 95, 114.

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