Flora of North America species comparison

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

herbage pubescent with scurfy and arachnoid hairs.

terete, finely white-mealy when young.

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.

alternate, petiolate proximally, becoming sessile distally, crowded;

blade oblanceolate or proximal rhombic, 10–20(–30) × 3–15 mm, base cuneate or attenuate, margin entire to repand-denticulate, apex acute to obtuse, scurfy.

with calyx 4–5-lobed.

in axillary glomerules, in short axillary spikes or terminal spikes.

axillary, solitary or few and clustered below staminate.

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

radicle superior.

dimorphic: dark reddish brown, 1.5 mm wide, or black, slightly smaller;

radicle basal, horizontal.

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, bordered by narrow horizontal wing or acutely angled, broadly turbinate or hemispheric, united except at minute apical tips, 6–12 mm, spongy and inflated at maturity, flattened at summit.

= 18.