Flora of North America species comparison

alternate except proximal-most;

petiole 2–3 cm;

blade green on both sides, triangular to lance-triangular, 30–120 × 12–90 mm, hastate or subcuneate, margin subentire or irregularly dentate, farinaceous at first, finally glabrous.

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.

in terminal or axillary pyramidal panicles 6–25+ cm.

5-merous, with bracteoles free to base.

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

dimorphic, all bracteolate and lacking sepals.

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

vertical; of larger bracteoles yellowish brown, flat, 2–3 mm wide, dull; of smaller bracteoles black, 1.5 mm wide or less, shiny;

radicle inferior, basal.

brown, 1.5–2 mm.

bracteoles orbiculate-ovate, of 2 sizes;

larger ones 5–6 × 5 mm;

smaller ones 2 × 2 mm, margin entire, surfaces smooth.

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.