Flora of North America species comparison

± solid.

± solid or fistulose.

proximal blades toothed, faces hirsute.

proximal blades pinnatifid to toothed, faces ± hirsute and sometimes sparsely stipitate-glandular as well.

subtending heads usually overlapping at least proximal 1/2 of each involucre.

subtending heads sometimes overlapping proximal 0–1/2 of each involucre.

5;

laminae deep yellow, 6–14 mm.

(7–)8–12;

laminae pale yellow, 6–12 mm.

6, all or mostly functionally staminate;

anthers reddish to dark purple.

10–21, all or mostly functionally staminate;

anthers yellow or brownish.

sessile-glandular near margins, sometimes with non-glandular, non-pustule-based hairs as well.

± evenly and minutely stipitate-glandular, including margins and apices, with non-glandular, non-pustule-based hairs as well.

usually in glomerules or pairs, sometimes well separated, in racemiform or paniculiform arrays.

in crowded to open, corymbiform or paniculiform arrays.

in 1 series.

in 1 series.

of 5–12 lanceolate to oblong or linear, entire or fringed scales 1–1.5 mm.

usually of 4–9 linear or oblong scales 0.8–1.1 mm, or of 1–5 subulate to setiform scales 0.1–0.9 mm, rarely 0.

= 24.

= 18.