Flora of North America species comparison

alternate, subsessile or proximal short petiolate;

blade ascending, oblong, oblong-ovate, or lanceolate to elliptic, 5–40 × 2–10 mm, thin, base acute to obtuse, margin entire, apex acute to acuminate.

persistent, proximal ones opposite, becoming alternate distally, short petiolate or subsessile;

blade oblong to oblong-lanceolate, ovate, obovate, or spatulate, 12–40(–50) × 5–25 mm, base commonly subhastate to cuneate, margin entire or sinuate-dentate to strongly undulate-crisped, apex acute.

of both sexes in small axillary glomerules, 5-merous.

in interrupted or crowded glomerules 2–4.5 mm thick, in sparsely leafy paniculate spikes to 5+ dm.

few to solitary, in axillary clusters or in crowded or interrupted, often leafy, erect, branched spicate racemes or racemose panicles to 25+ cm.

light brown to amber, 1–1.5 mm.

brown, 1.5–2 mm.

bracteoles almost sessile, broadly cuneate, 2–5 × (2–)2.5–5 mm, united to summit, truncate at summit, sides smooth or obscurely tuberculate.

bracteoles on slender or stout stipes (2–)4–20 mm (or sessile), body broadly elliptic to globose, 6–15 mm and wide, spongy, united to the linear apex, margin deeply laciniate, faces appendaged with flattened to hornlike tubercles to 8 mm.

= 36.