Flora of North America species comparison

glabrous.

glabrous.

basal absent at flowering;

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

basal sometimes persistent, proximal usually absent at flowering;

cauline blades 1-nerved, narrowly elliptic-oblanceolate to elliptic-lanceolate, 1–2 mm wide, reduced distally.

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

campanulate, 4–7 mm diam.

4–9;

corollas yellow, 2.3–4(–5.4) mm.

8–15;

corollas white, drying light yellow or reddish, 6–7.5 mm.

(8–)10–12(–17).

(16–)20–30(–40).

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

borne singly or in loose, open 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.

0.9–1.6 mm, faces without oil cavities, densely strigoso-sericeous (hair apices prominently bulbous-capitate);

pappi coroniform or of 1 series of basally connate scales 0.1–0.3 mm (obscured by cypsela indument).

apices flat.

apices flat.

= 8.

= 8.