Flora of North America species comparison

erect, glabrous.

prostrate (mat-forming, densely leafy), puberulent (in decurrent lines).

narrowly linear, 10–50 × 1–2 mm (sometimes smaller, bractlike distally), margins with 0–1 pairs of setae, faces glabrous (abaxial dotted near each margin with a row of elliptic oil-glands ca. 0.3 mm).

oblong-oblanceolate to obovate, 3–17 × 1.5–4 mm wide, margins with 2–6 pairs of setae 1–2 mm, faces glabrous (dotted with scattered, round oil-glands 0.1–0.2 mm).

10–80 mm.

1–12 mm.

cylindric.

campanulate.

5;

corollas 6–11 mm (laminae often dotted near margins with inconspicuous oil-glands).

5;

corollas 3.5–5 mm.

4–7;

corollas 3.7–6 mm (lobes 5, equal, each with 1 subterminal oil-gland).

12–21;

corollas 2.5–3.5 mm (2-lipped).

distinct, linear-oblong, 5–9.5 × 1–1.5 mm (each dotted with 1–2 swollen, subapical oil-glands and a row of 2–3 linear, submarginal oil-glands on each side of midrib).

distinct, obovate, 4.5–6 × 2–4 mm (faces densely dotted with scattered, circular oil-glands 0.05–0.2 mm).

borne singly or in open, cymiform arrays.

borne singly or in congested, (leafy) cymiform arrays.

3.5–5 mm, puberulent (hair tips blunt);

pappi of 1–3 stout awns 1–2 mm or coroniform.

2.5–4 mm, mostly puberulent (ray cypselae abaxially glabrous);

ray pappi of 2–3 slender, aristate scales 1.5–2.5 mm plus 2–10 lacerate scales or bristles;

disc pappi of 4–15, antrorsely scabrid bristles or aristate scales 2–3 mm plus 0–15 bristles or scales.

= 24.

= 72.