Flora of North America species comparison

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

ascending or erect, usually producing axillary shoots below 1st-order inflorescence or at proximal nodes, (30–)40–100 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.

blades light or yellowish green, veins scarcely prominent abaxially, linear-lanceolate, 6–17 × 1–4(–5) cm, usually ca. 5–6 times as long as wide, widest near middle, thin, not coriaceous, base cuneate, margins entire, flat or undulate, apex acute.

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

terminal and axillary, terminal usually occupying distal 1/5–1/3 of stem, rather dense or interrupted in proximal 1/2, broadly to narrowly paniculate (branches usually with 2d-order branches, rarely 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.

articulated in proximal 1/3 or almost near base, filiform (but slightly thickened distally), 4–8 mm, usually ca. 1.5 times as long as inner tepals, articulation indistinctly 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.

10–25 in whorls;

inner tepals broadly triangular, (2–)2.5–3.5(–3.8) × (2–)2.5–3(–3.5) mm, base truncate or rounded, margins entire or indistinctly erose only near base, apex acute, occasionally subobtuse-triangular;

tubercles usually 3, (1 in some forms, then large, occupying at least 0.5 width of inner tepal), equal or subequal, much narrower than inner tepals glabrous or minutely verrucose.

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

brown or dark reddish brown, 1.7–2.2 × 1–1.5 mm.

= 20.

= 20.