Flora of North America species comparison

(forming clumps) simple or branched among heads.

usually simple, sometimes branched.

(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).

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).

hemispheric to campanulate.

broadly campanulate.

10–22;

corollas yellow.

6–13;

corollas yellow.

corollas yellow;

anthers yellow.

corollas yellow;

anthers yellow.

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

10–20, narrowly ovate to lanceolate.

1 or 3–7.

1, or 3–5(–10).

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).

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

pappi white, bristles barbellate.

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

= 38, 57, 76, 95, 114.