Flora of North America species comparison

(forming clumps) simple or branched among heads.

solitary, simple.

(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).

3–5 pairs, crowded toward stem bases (some or all axils with dense tufts of brown wool); petiolate (petioles at least basal leaves, narrow or broadly winged);

blades (with 3 or 5 prominent, subparallel veins) usually narrowly oblanceolate to oblong, rarely oval or broadly spatulate, 4.5–20 × 0.5–2.5 cm, margins denticulate, apices obtuse, faces moderately uniformly hairy, stipitate-glandular.

hemispheric to campanulate.

broadly hemispheric.

10–22;

corollas yellow.

8–16;

corollas yellow-orange.

corollas yellow;

anthers yellow.

corollas yellow;

anthers yellow.

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

13–21, elliptic-oblong or narrowly to broadly lanceolate.

1 or 3–7.

1(–3).

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).

brown, 3.5–7 mm, densely hirsute, sometimes sparingly stipitate-glandular;

pappi usually white, sometimes tawny, bristles barbellate.

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

= 38, 57.