Flora of North America species comparison

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.

persistent, alternate, petiolate;

blade gray-green, deltate to rhombic, ovate, or oblong-elliptic, 5–50 × 5–50 mm, base truncate to subhastate, margin entire to repand or subhastately lobed, apex rounded to obtuse, scurfy.

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

yellow, in clusters 1–2 mm wide, borne in panicles 0.5–5 dm.

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

with less complex panicles.

brown, 1.5–2 mm.

brown, 0.8–1.6 mm wide.

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.

bracteoles sessile, orbiculate to oval, greatly compressed, mainly 3–4.5 mm and wide, crenulate, apex rounded.

= 18.