Flora of North America species comparison

usually erect, rarely ascending, branched above middle, 25–90(–100) cm.

erect or, rarely, ascending, simple or producing axillary shoots below 1st-order inflorescence or at proximal nodes, 40–100(–150) cm.

ocrea prominent and persistent at maturity, whitish or silvery white, membranous;

blade oblong, oblong-elliptic, or obovate-lanceolate, (5–)8–30 × 2–8(–12) cm, base cuneate or narrowly cuneate, margins entire, flat or indistinctly crisped, apex acute or acuminate, rarely obtuse.

blades with lateral veins forming angle of 45–60° with midvein, linear-lanceolate or lanceolate, 5–30(–40) × 1–5 cm, usually 5–7(–10) times as long as wide, normally rather thin or at most subcoriaceous, base narrowly cuneate, margins entire, flat or slightly undulate, apex acute or acuminate.

terminal, occupying distal 1/2 of stem, narrowly paniculate, rarely simple.

terminal and axillary, terminal usually occupying distal 1/3–1/2 of stem, usually lax, interrupted at least in basal 1/2, narrowly paniculate.

articulated near middle or in proximal 1/3, filiform, 5–15(–20) mm, articulation indistinct.

articulated in proximal part, distinctly thickened distally, 10–17 mm, (2.5–)3–5 times as long as inner tepals, articulation distinctly or slightly swollen.

5–20 in whorls;

inner tepals oblong-cordate or orbiculate-cordate, 11–16 × 9.5–14 mm, base sinuate or emarginate, margins entire, rarely with few extremely small denticles at base, apex obtuse or subacute;

tubercles absent.

10–15(–25) in remote whorls;

inner tepals ovate-triangular or ovate-deltoid, 3.5–5 × 2.5–4 mm, longer than wide or, very rarely, as long as wide, base truncate or rounded, margins entire or, rarely, very indistinctly erose, apex acute or subacute (then with broadly triangular-lingulate tip);

tubercles 3, equal or subequal, minutely punctate and/or transversely rugose (wrinkled) in proximal part.

brown or reddish brown, 4–5(–7) × 2.5–4.5(–5) mm.

brown or dark brown, 2.3–3.1 × 1.6–2.2 mm.

= 40.

= 60.