Flora of North America species comparison

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

erect, branched distal to middle, 40–80(–130) 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.

ocreae usually deciduous, rarely partially persistent at maturity;

blade oblong-lanceolate, lanceolate, or narrowly lanceolate, normally 15–25(–30) × 2–7 cm, base cuneate or truncate, margins entire or irregularly denticulate, usually crisped and undulate, or, occasionally, flat, apex acute or subobtuse.

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

terminal, occupying distal 1/2 of stem, dense or interrupted at base, narrowly paniculate, branches usually straight or occasionally arcuate.

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

articulated in proximal 1/3, filiform, 3–8 mm, articulation distinctly 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.

20–25 in whorls;

inner tepals orbiculate-ovate or occasionally ovate-deltoid, 3.5–5 × 3–5 mm, base truncate or slightly cordate, margins denticulate, apex acute or subacute, teeth 4–10 at each side, 0.2–1.5 mm;

tubercles normally 3, equal or subequal, less than 2 times as wide as inner tepals.

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

usually reddish brown or dark brown, 2–2.5(–3) × 1–1.5 mm.

= 40.

= 60.