Flora of North America species comparison

erect or decumbent, branched from bases and/or distally (sometimes rooting at proximal nodes).

blades 2–10 cm × 4–30+ mm.

cauline; opposite;

petiolate or sessile;

blades (1- or 3-nerved) lanceolate to lance-linear, bases cuneate, margins serrate to subentire, faces sparsely scabrellous.

hemispheric, 3–5 mm diam.

flat to convex, paleate (paleae linear to filiform, not conduplicate, falling with fruits).

20–40 (in 2–3+ series), pistillate, fertile;

corollas white or whitish.

ca. 2 mm.

ca. 1.5 mm.

15–30+, bisexual, fertile;

corollas white or whitish, tubes much shorter than ampliate, cylindric throats, lobes 4–5, ± deltate.

persistent, 8–12+ in 2–3 series (lanceolate to linear, subequal, thin-herbaceous, spreading in fruit).

radiate, in loose, corymbiform arrays or borne singly.

ca. 2.5 mm.

obcompressed, weakly 3–4-angled (not winged, epidermes usually corky and rugose to tuberculate);

pappi persistent, coroniform (sometimes with 2 teeth).

= 11.

= 22 (as E. alba).