Flora of North America species comparison

single, branches divaricately or freely spreading, glabrous or sparsely pubescent.

withered at flowering;

basal blades linear to oblanceolate, runcinate, 3–10 cm, margins pinnately lobed;

cauline much reduced, bractlike.

2–10 mm (along branches), or 10–40 mm (in paniculiform arrays).

10–40 mm, densely glandular.

5–7 mm (glabrous, puberulent, or densely stipitate-glandular).

densely glandular.

5–11.

7–9.

of appressed or reflexed bractlets (glabrous, pubescent, or stipitate-glandular).

of appressed bractlets.

borne singly or clustered along branches or in paniculiform arrays.

borne in small paniculiform arrays along branches.

light tan to dark brown, 2.1–6.8 mm, faces smooth to tuberculate, grooved;

pappi of 5–24 tan or white bristles (falling or widened bases persistent, bases connate in groups of 2–4 distal portions breaking off), plumose on distal 50–85%.

light to dark tan, 2.1–2.4 mm, faces tuberculate, grooved;

pappi of 9–14, white to light tan bristles (bases persistent, connate in groups of 2–4, plumose on distal 55–60%).

= 16.

= 16.