Flora of North America species comparison

stiffly erect;

branchlets terete.

simple or more commonly divaricately branching throughout, branches terete;

herbage whitish scurfy to glabrate.

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.

alternate, short petiolate, blade prominently 3-veined, ovate to lanceolate, mainly 12–80 × 6–50 mm, margin irregularly sinuate-dentate and often subhastately lobed or rarely some entire, apex acute to obtuse.

in axillary glomerules or interrupted terminal spikes.

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

with 4 or 5 sepals.

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

in axillary glomerules of 5–10.

brown, 2.4–2.8 mm.

dimorphic: brown, 2–2.5 mm wide, or black, 1–2 mm wide;

radicle inferior.

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.

bracteoles prominently 3–5-veined, sessile or short stipitate, (3–)4–6(–10) mm and as wide, sometimes subhastately lobed at base, conspicuously dentate, sharply tuberculate to almost smooth on faces.

= 18.