Flora of North America species comparison

mostly alternate, shortly petiolate;

blade narrow to broadly rhomboid, lanceolate, oblanceolate, or elliptic, (8–)12–35(–42) × 6–16 mm, thin, margin coarsely and irregularly dentate, glabrescent adaxially, somewhat scurfy abaxially.

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 subterminal, axillary glomerules.

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

in axillary glomerules.

in spikes or spicate panicles 4–30 cm.

circular.

brown, 2 mm wide.

bracteoles sessile or on the stipe to 0.5 mm, rhombic to obovate, almost flat to convex, 2.2–4 × 1.7–2.7 mm, thin or somewhat thickened in age, connate in basal 1/2, margin entire in basal 1/2, 2–4-toothed in distal 1/2, apex acute, scurfy.

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.

= 18.