Flora of North America species comparison

prostrate to decumbent, branched throughout.

cauline; opposite;

petiolate;

blades (± 3-nerved) deltate to ovate or lanceolate, bases cuneate to truncate, margins toothed, faces ± scabrellous.

obconic, 3–8 mm diam.

convex, paleate (paleae persistent, scarious).

3–8, pistillate, fertile;

corollas pale yellow.

10–20, bisexual, fertile;

corollas yellow, tubes shorter than funnelform throats, lobes 4–5, ± deltate.

persistent, 5 in 1(–2) series (linear to lanceolate, herbaceous).

radiate, borne singly (in axils).

compressed or flattened, cuneate (faces often tuberculate);

pappi persistent, of 2(–5+) stout awns.

= 12.