Flora of North America species comparison

glabrous.

glabrous or minutely hispidulous.

basal absent at flowering;

cauline blades 1-nerved, linear to filiform, 0.5–1 mm wide, reduced distally.

basal absent at flowering;

cauline blades 1-nerved, filiform to linear, 0.5–1(–1.3) mm wide, reduced distally, often reduced in arrays to tiny, curved bracts.

narrowly campanulate (lengths ± equaling diams.), 3–4 mm diam.

turbinate to cylindric-turbinate (longer than diams.), 2.5–4 mm diam.

4–9;

corollas yellow, 2.3–4(–5.4) mm.

4–13;

corollas yellow, 2.5–7 mm.

(8–)10–12(–17).

(4–)6–13.

borne singly or (sessile in glomerate clusters of 3–5) in loose arrays.

borne singly or (sometimes subsessile and in clusters of 2–3) in loose arrays.

1–1.2 mm, faces densely strigoso-sericeous (hairs ± twisted, apically attenuate);

pappi of 1–2 series of oblanceolate scales 0.5–1 mm.

2–2.8 mm, faces densely strigoso-sericeous;

pappi of 1–2 series of lanceolate to oblanceolate scales 1.5–2.2 mm.

apices flat.

apices flat.

= 8.

= 16, 24.