Flora of North America species comparison

procumbent to ascending.

basal and/or cauline; opposite;

petiolate [sessile];

blades deltate, lanceolate, lance-ovate, or ovate, often pinnately or palmately lobed, ultimate margins coarsely toothed to subentire, faces glabrate, hirsute, scabrellous, or strigillose.

cylindric to hemispheric, 4–8 mm diam.

convex to conic, paleate (paleae ± persistent, lance-linear, scarious, weakly conduplicate, often apically toothed).

[0–]3–8[–13], pistillate, fertile;

corollas pale yellow [white or purplish].

[20–]40–80+, bisexual, fertile;

corollas yellowish [whitish or purplish], tubes shorter than cylindric or funnelform throats, lobes 5, usually deltate [sometimes rays 0 and corollas of peripheral florets ± bilabiate].

persistent, 11–15+ in 2–3+ series (outer usually shorter, more herbaceous, the inner often scarious).

radiate [discoid], borne singly [in ± cymiform arrays].

obconic to obpyramidal, 3-, 4-, or 5-angled, densely piloso-sericeous [glabrous, villous];

pappi [sometimes wanting in rays] persistent, of [10–]20[–40], plumose [ciliate], setiform scales.

= 10.