Flora of North America species comparison

erect or ascending, glabrous or sparsely puberulent (in decurrent lines).

prostrate to erect, usually sparsely to densely puberulent (sometimes in decurrent lines), sometimes glabrate.

linear to narrowly elliptic, 10–50 × 1–5 mm, margins with 1–3 pairs of setae, faces glabrous or sparsely puberulent (dotted on margins with round oil-glands 0.2–0.7 mm).

narrowly linear, 10–35 × 0.2–1.8 mm, margins with 1–5 pairs of setae 1–2 mm, faces glabrous (abaxial submarginally dotted with broadly elliptic to circular oil-glands 0.2–0.3 mm, sometimes with additional, scattered oil-glands).

20–80 mm.

filiform, (3–)7–35(–54) mm.

campanulate.

cylindric.

8(–13);

corollas 5–11 mm.

5;

corollas 3.5–5 mm.

(7–)20–55;

corollas 3.5–5 mm (2-lipped).

3–7;

corollas 2–3 mm (2-lipped).

distinct, oblong or narrowly obovate, 4–7 × 1–2 mm (dotted with 0–2, subterminal oil-glands plus 2–4 pairs of inconspicuous, round to narrowly elliptic, submarginal oil-glands).

distinct, linear-oblanceolate, 4–5 × 0.8–1 mm (dotted with 1–2 elliptic, subapical oil-glands 0.2–0.3 mm, sometimes with additional, smaller submarginal or scattered oil-glands).

borne singly or in open, cymiform arrays.

borne singly or in diffuse, cymiform arrays.

3–4.5 mm, strigillose or short-pilose;

ray pappi of 1–4, antrorsely barbed awns 1–4 mm or coroniform;

disc pappi of 15–30, antrorsely barbed bristles 2.5–5 mm or coroniform.

2.5–3 mm, strigillose;

pappi of 0–5, antrorsely scabrid bristles or slender scales 1–2 mm plus 0–5 entire or irregularly lacerate scales 0.2–0.7 mm.

= 24 (as P. palmeri).

= 48.