Flora of North America species comparison

mostly erect and branched, branches green, obtusely angled or striate, glabrate.

terete, finely white-mealy when young.

alternate except the proximalmost, petiolate;

blade green on both sides, rhombic-lanceolate to lanceolate, oblong, or narrowly lance-oblong or hastate-ovate, 25–120 × 3–40(–75) mm, entire or toothed, proximal ones broadly cuneate or sometimes hastate subbasally with obliquely antrorse basal lobes, distal cauline leaves lanceolate and entire.

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.

compact or interrupted spiciform or paniculiform clusters.

mostly 5-merous.

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

axillary, solitary or few and clustered below staminate.

dimorphic: brown, 2.5–3(–3.5) mm wide, or black, 1–2 mm wide;

radicle of brown seeds subbasal to median, antrorse.

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

radicle basal, horizontal.

bracteoles green becoming black, rhombic to rhombic-triangular, or ovate-rhombic, compressed, ± uniformly sized, 2–7(–20) mm, base mostly hastate, acute, margin united almost to middle, entire or sparingly toothed, surfaces tuberculate.

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.

= 36.