Flora of North America species comparison

mostly alternate;

petiole 0.5–2.5 cm, becoming shorter or subsessile in distal ones;

blade deltoid to rhombic-ovate or lanceolate, (10–)15–50(–70) × 8–40 mm, base rounded, truncate, or broadly cuneate, margin irregularly sinuate-dentate or repand-dentate to entire, sometimes subhastate, apex obtuse to acute;

distal blades often narrower and sometimes entire except for basal lobes.

opposite or subopposite proximally, or some alternate distally;

petiole 2–6 mm;

blade yellow green, ovate to obovate, elliptic, or orbiculate, 8–55 × 6–32 mm, base obtuse to cuneate, margin entire or repand-dentate, apex rounded to acute, sparingly scurfy.

in dense or interrupted, naked, simple or paniculate spikes mainly 5–8 mm thick, staminate ones 4-merous.

brown to tan or yellow, in clusters 2–4 mm wide, on panicles 2–10(–15) cm.

in spikes or spicate panicles 4–30 cm.

dark brown or black, 0.8–1.5 mm;

radicle inferior.

brown, 2 mm wide.

bracteoles densely packed on rachis, sessile, ovate-oblong or rounded-deltoid, (2–)2.5–3(–4.5) mm, united only at rounded or truncate base, angled and cristate on faces, thin or spongy-thickened.

bracteoles sessile or on stipes to 7 mm, body 4-winged, 6–10 mm and wide, toothed apically, surface smooth, reticulate, or with flattened processes, wings 3–4 mm wide.

= 18.