Flora of North America species comparison

slender to stout, mainly 1–5(–7) dm, branching almost throughout;

herbage pubescent with scurfy and arachnoid hairs.

stiffly erect;

branchlets terete.

alternate, proximalmost on petioles (3–)5–30 mm, becoming subsessile or short petiolate distally;

blade 3-veined, ovate to rhombic or orbiculate to elliptic, 0.4–5 × 0.2–3 cm, base rounded to cuneate, margin entire, apex acute to obtuse.

tardily deciduous, alternate or proximal-most subopposite, shortly petiolate;

blade gray green, oblong-ovate to elliptic or orbiculate, 8–30(–35) × 6–20 mm, margin entire or rarely dentate, apex rounded to retuse or obtuse.

with calyx 4–5-lobed.

yellow, in clusters 2–3 mm wide, borne in panicles 6–30 cm.

in small, very numerous glomerules in axils of elongated, terminal leafy-bracteate spikes or finally paniculate.

greenish, yellowish, or brown, 0.9–2 mm;

radicle superior.

brown, 2.4–2.8 mm.

bracteoles sessile, ovate to oblong or broadly cuneate or pan-duriform, 1.5–5.5 × 1.5–5 mm, thick, united to apex, apex truncate to cuspidate or tridentate, surfaces with thickened processes or rarely smooth.

bracteoles sessile or substipitate, 4–5 × 5–9 mm, base broadly cuneate, margin sharply toothed, apical tooth subtended by 2–6 equal or smaller teeth, faces smooth or rarely tuberculate.

= 18.