Flora of North America species comparison

usually 1, usually erect.

basal and cauline; alternate;

petiolate or sessile;

blades oblanceolate or lanceolate to linear, bases ± cuneate, margins entire, faces usually bicolor [concolor], abaxial usually white to gray and tomentose (sometimes glandular as well, proximal leaves sometimes ± glabrate), adaxial usually greenish and glabrate or glabrous, sometimes grayish and sparsely arachnose.

subglobose, 6–8(–10) mm.

50–150 (more numerous than staminate; sometimes a few pistillate florets peripheral in predominantly staminate heads or 1–9 staminate florets central in predominantly pistillate heads);

corollas yellowish.

30–55;

corollas yellowish.

in 8–12 series, bright white (opaque, at least toward tips, often proximally woolly; stereomes not glandular), unequal, ± papery (at least toward tips).

usually discoid (unisexual or nearly so) or disciform, in glomerules in corymbiform or paniculiform arrays.

oblong [obclavate, ovoid, or cylindric] (2-nerved), faces ± scabrous (hairs clavate, not myxogenic);

pappi usually readily falling, of 10–20 distinct or basally connate, barbellate bristles (tips of bristles ± clavate in bisexual or functionally staminate florets).

= 14.