Flora of North America species comparison

erect [decumbent].

basal and/or cauline;

petiolate or sessile;

blades mostly spatulate to oblanceolate, margins entire, sinuate-dentate, or pinnately lobed, abaxial faces tomentose to sparsely arachnose.

hemispheric to campanulate, 10–25 mm diam.

flat, alveolate (pit margins often ciliate), epaleate.

pistillate, fertile (staminodes often present);

corollas white, cream, yellow, orange, pink, purple, violet, or blue (sometimes dark abaxially), laminae 4-veined, 3-toothed.

usually bisexual and fertile, sometimes functionally staminate;

corollas yellow or brown to violet or purple.

in 3–6+ series, distinct, outer linear to oblong, inner ovate to elliptic, margins ± scarious.

ovoid to obovoid, abaxial faces ± rounded, 3–5-ribbed or -winged (wings sometimes toothed and inflexed into 2 longitudinal grooves), adaxial faces flattened, apices sometimes forming callous borders, faces (smooth or transversely rugose) glabrous or pilose to sericeous;

pappi usually present, persistent, usually of 5–8 ovate to oblong scales in 2 series, sometimes coroniform, sometimes none.

= 9.