Flora of North America species comparison

simple or more commonly branched throughout, mainly 2–8(–10) dm, branches mostly obtusely angled;

herbage scurfy, becoming glabrate.

alternate or proximalmost opposite, short petiolate proximally, sessile and often cordate-clasping distally;

blade ovate to deltoid or oval, 4–30(–40) × 3–30 mm, base truncate or subhastate to rounded, margin entire or dentate, apex acute to obtuse.

alternate except proximal-most;

petiole 2–3 cm;

blade green on both sides, triangular to lance-triangular, 30–120 × 12–90 mm, hastate or subcuneate, margin subentire or irregularly dentate, farinaceous at first, finally glabrous.

in axillary glomerules.

in terminal or axillary pyramidal panicles 6–25+ cm.

in glomerules mainly in distal axils;

sepals 3–5.

5-merous, with bracteoles free to base.

dimorphic, all bracteolate and lacking sepals.

brown, 1–2 mm wide.

vertical; of larger bracteoles yellowish brown, flat, 2–3 mm wide, dull; of smaller bracteoles black, 1.5 mm wide or less, shiny;

radicle inferior, basal.

bracteoles scarcely compressed, 2–3 mm and as wide, apex truncate to broadly rounded, with 3 (or more) teeth across summit, surfaces smooth (or rarely tuberculate).

bracteoles orbiculate-ovate, of 2 sizes;

larger ones 5–6 × 5 mm;

smaller ones 2 × 2 mm, margin entire, surfaces smooth.

= 18.

= 36.