Flora of North America species comparison

prostrate (rooting at nodes, ± fleshy) to decumbent or erect, glabrous.

branched ± throughout, ± strigillose to villous, glabrescent.

sessile (bases sheathing stems);

blades linear to lanceolate or oblong (sometimes lobed, lobes lanceolate to linear), (1–)2–3(–7) cm, ultimate margins entire or irregularly toothed or lobed, faces gland-dotted.

petiolate or sessile;

blades obovate to spatulate, 2–3-pinnately lobed (ultimate lobes narrowly spatulate to linear), (1–)2–3(–6) cm.

6–9(–12+) mm diam.

3–4(–6) mm diam.

0 (peripheral pistillate florets 12–40+ in 1 series; corollas 0).

0 (peripheral pistillate florets 8–80+ in 1–3+ series; corollas 0).

yellow, 1–1.5 mm.

ochroleucous to pale yellow, 0.5–0.8 mm.

21–30+ in 2–3+ series.

13–22+ in 2–3 series, subequal (apices brown).

outer 1.2–1.8 mm, winged, adaxial faces papillate;

inner 0.7–1 mm, scarcely, if at all, winged, not papillate.

outer stalked, 1–1.2 mm, ± winged, faces ± papillate;

inner sessile, 0.8–1 mm, not winged, not papillate.

= 20.

= 36, 40.