Flora of North America species comparison

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

prostrate to ascending (often mat-forming, densely leafy distally), puberulent (in decurrent lines or throughout) or 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).

(bluish green) linear to linear-oblanceolate or narrowly oblong, 10–30 × 1.5–4 mm, margins with 2–5 pairs of setae 1–2 mm, faces glabrous (abaxial densely dotted with scattered, circular oil-glands 0.05–0.2 mm).

20–80 mm.

1–5 mm.

campanulate.

cylindric.

8(–13);

corollas 5–11 mm.

3(–4);

corollas 3–4 mm (scarcely surpassing phyllaries).

(7–)20–55;

corollas 3.5–5 mm (2-lipped).

(3–)7–14;

corollas 2.2–2.6 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).

coherent (falling together), oblong to oblong-obovate, 6–10 × 2–3 mm (dotted with scattered, elliptic oil-glands 0.05–0.15 mm).

borne singly or in open, cymiform arrays.

borne singly or in congested, (leafy) 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.

4–5.5 mm, puberulent (distally glandular-puberulent);

pappi of 2 (ray) and 5 (disc) lanceolate scales 1.5–3.5 mm.

= 24 (as P. palmeri).

= 48.