Flora of North America species comparison

mostly simple.

usually simple, rarely branched.

3–8 pairs, mostly crowded toward bases; petiolate (at least proximal);

blades elliptic to oblanceolate or obovate, 5–10 × 0.5–3.5 cm, margins entire, apices acute, faces densely hairy (hairs relatively short, curly) and sessile-glandular (distal leaves sessile, much reduced).

1–4 pairs, mostly cauline; petiolate;

blades elliptic, lanceolate, oblanceolate, ovate, or spatulate, 1.2–10 × 0.5–3.5 cm, margins usually denticulate to dentate, rarely entire, apices acute to obtuse or abruptly pointed, faces usually glabrous or sparingly hispidulous-puberulent, rarely stipitate-glandular.

campanulate to hemispheric.

hemispheric to campanulate-turbinate (bases sparsely to densely pilose, hairs white or yellow).

5–12;

corollas yellow.

6–17;

corollas yellow.

(functionally staminate): corollas yellow;

anthers yellow (styles rarely exserted).

corollas yellow;

anthers yellow.

5–12 (in 1 series), oblong or elliptic.

9–20, lanceolate to oblanceolate, not stipitate-glandular.

1–6.

usually 1, sometimes 2–3 (erect or nodding).

brown to black, 4–10 mm, sparsely to densely hirsute (hairs usually simple, rarely duplex) and sparsely stipitate-glandular;

pappi 0.

brown, 2.5–6 mm, abaxially glabrous, adaxially sparsely hirsute or glabrous throughout, rarely glandular;

pappi white, bristles barbellate.

= 38, 76.