Flora of North America species comparison

solitary to densely clumped, simple or branched among heads.

(forming clumps) simple or branched among heads.

4–8(–10) pairs, mostly cauline; usually sessile (sometimes with partly connate-sheathing bases), sometimes petiolate (proximalmost);

blades lance-elliptic, lanceolate, oblanceolate, obovate, or ovate, 4–12(–20) × (1–)2–6(–8) cm, margins subentire to dentate-serrate, apices usually acute, rarely obtuse, faces glabrate to pilose.

(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 campanulate to turbinate.

hemispheric to campanulate.

(5–)7–17(–20);

corollas yellow.

10–22;

corollas yellow.

corollas yellow;

anthers yellow.

corollas yellow;

anthers yellow.

8–15(–19), narrowly to broadly lanceolate.

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

(1–)3–10(–20).

1 or 3–7.

brown, 4–8 mm, sparsely hirsutulous, stipitate-glandular;

pappi tawny, bristles subplumose.

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, 133, 152.