Flora of North America species comparison

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

erect, often flexuous in inflorescence, branched distal to middle, occasionally almost from base, 20–70(–80) 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.

ocrea deciduous or partially persistent at maturity;

blade oblong, elliptic-lanceolate, or ovate-elliptic, 3–8(–12) × 2–5 cm, normally less than 4 times as long as wide, not coriaceous, base normally truncate or subcordate to weakly cordate, margins entire, flat to weakly undulate, occasionally slightly crisped, apex obtuse or subacute.

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

terminal, occupying distal 1/2 of stem, usually lax and interrupted, broadly paniculate, branches usually ascending and straight.

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

articulated in proximal 1/3, filiform, 2–5 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.

10–20 in rather dense remote whorls;

inner tepals ovate-triangular or deltoid, 3–5.5(–6) × 2–3 mm (excluding teeth), ca. 1.5 times as long as wide, base truncate, margins in most cases distinctly dentate, very rarely subentire, apex acute to subacute, straight, teeth 2–4(–5), normally at each side of margins, narrowly triangular, straight, 1–3(–5) mm, equaling or shorter than width of inner tepals;

tubercles (1–)3, equal or subequal.

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

dark reddish brown, 2–2.8 × 1.4–1.8 mm.

= 40.

= 40.