Flora of North America species comparison

decumbent to erect, glabrous.

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

linear, 15–35 × 1–2 mm, margins with 3–5 pairs of setae, faces glabrous (abaxial densely dotted with round oil-glands ca. 0.2 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).

5–25 mm.

filiform, (3–)7–35(–54) mm.

cylindric to narrowly fusiform.

cylindric.

5;

corollas 3.5–4.2 mm.

5;

corollas 3.5–5 mm.

4–6;

corollas 2.2–2.5 mm (2-lipped).

3–7;

corollas 2–3 mm (2-lipped).

coherent (falling together), linear or linear-oblanceolate, 5–7 × 1–2 mm (dotted with scattered, oval oil-glands 0.2–0.3 mm).

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 condensed, cymiform arrays.

borne singly or in diffuse, cymiform arrays.

3–3.5 mm (pericarps darkening, not swelling, ovules abortive), strigillose to short-pilose;

pappi of 2 (ray) or 5 (disc) slender, antrorsely scabrid, aristate scales 2–2.5 mm, sometimes with additional shorter scales or bristles.

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.

= 3x = 36.

= 48.