Flora of North America species comparison

minutely, prominently, often sparsely, papillate-scabrous (hairs triangular or deltate to lanceolate, less than 0.1 mm).

proximal usually absent at flowering;

cauline blades 1-nerved, linear, 0.5–1.2 mm wide, little reduced distally.

campanulate, 2.5–5 mm diam.

10–15;

corollas yellow, 3–5.5 mm.

18–37.

in loose arrays.

0.9–1.2(–1.4) mm, faces without oil cavities, densely strigoso-sericeous in rows (hairs appressed to spreading, apices clavate);

pappi of 1 series of narrowly triangular or narrowly oblong scales 0.2–1 mm (distinct or basally connate 1/4–3/4 their lengths, usually shorter in rays).

apices flat.

= 8 (10).