Flora of North America species comparison

ascending or erect, usually producing axillary shoots below 1st-order inflorescence or at proximal nodes, 50–90 cm.

blades ovate-lanceolate, oblong-lanceolate, or lanceolate, 10–15 × 3–5.5 cm, usually 2.5–3.5 times as long as wide, widest in proximal 1/3, thick, usually not coriaceous, base broadly cuneate, truncate, or rounded, margins entire, flat or slightly undulate-crisped, apex acute or attenuate.

terminal and axillary, terminal usually occupying distal 1/2 of stem, dense, narrowly to broadly paniculate (branches usually simple).

articulated in proximal 1/3, thin but slightly thickened distally, (2–)3–7(–8) mm, usually as long as or shorter than inner tepals, articulation slightly swollen.

12–20 in whorls;

inner tepals broadly cordate or broadly ovate-deltoid, 7–10 × 8–12 mm, base deeply and broadly cordate, margins entire, apex acuminate;

tubercles 3, equal or subequal, usually minutely to distinctly rugose.

brown or dark reddish brown, 2.5–3.5 × 2–2.5 mm.

= 20.