Flora of North America species comparison

erect, branched distally.

all or mostly cauline; opposite;

petiolate (petioles often ± winged, often with connate-perfoliate basal appendages);

blades (pinnately nerved) deltate or rounded-rhombic to cordate or ovate, often raggedly pinnately lobed (lobes 3–11), ultimate margins coarsely toothed to denticulate or entire, faces pilose or pilosulous to hirtellous, or glabrate, or glabrous, gland-dotted and/or stipitate-glandular.

hemispheric, 4–15+ mm diam.

flat to convex, paleate (paleae obovate to oblanceolate or spatulate, herbaceous to scarious).

2–6, pistillate, fertile;

corollas pale yellowish to whitish (tubes pilosulous, laminae ± cuneate to linear, 3-lobed, sometimes absent or nearly so).

12–30+, functionally staminate;

corollas pale yellow, tubes shorter than abruptly dilated throats, lobes 5, deltate to lance-ovate.

persistent, 6–21+ in 2 series (distinct, outer 2–6 ovate to linear, ± herbaceous, inner ovate to lanceolate, subequal to or shorter than outer, more scarious, similar to paleae).

0.

usually radiate, rarely ± disciform, (2–5+) in loose to congested, corymbiform clusters.

plumply pyriform, ± obcompressed, 3–6-angled or -ribbed, finely striate between ribs (narrowed at bases, patently inserted on receptacles, often minutely beaked), sparsely hirtellous or glabrate;

pappi 0.

= 15.