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.

persistent, alternate;

petiole 1–4 mm;

blade grayish or greenish, ovate to deltate, rhombic, oval, or lanceolate, typically subhastate, (5–)12–32 × 4–16(–20) mm, base truncate to obtuse, margin entire (rarely toothed), apex obtuse and apiculate.

in axillary glomerules.

in glomerules mainly in distal axils;

sepals 3–5.

yellow, in clusters 1 mm wide, borne in panicles mainly 10–30 cm.

in once-branched panicles.

brown, 1–2 mm wide.

brown, 1–1.9 mm wide.

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 sessile, orbiculate, greatly compressed, 1.3–4 mm, about as wide, margin crenate, apex rounded.

= 18.