Flora of North America species comparison

erect, branched in distal 2/3 (sometimes with few flowering stems from rootstock), 30–80(–120) cm.

ocrea deciduous to partially persistent at maturity;

blade oblong-lanceolate, obovate-lanceolate, or lanceolate, normally (5–)10–30 × 2.5–6 cm, base broadly cuneate, rounded, or truncate, rarely subcordate, margins entire, flat to very weakly undulate, apex subacute, occasionally obtuse.

terminal, occupying distal 2/3 of stem, lax, interrupted, broadly paniculate, branches simple or nearly so, almost all but distalmost whorls with subtending leaves;

panicle leafy at least in proximal 2/3 of length.

articulated in proximal 1/3 or occasionally near middle, filiform, 1–4(–5) mm, ca. as long as inner tepals or slightly longer, articulation distinctly swollen.

10–20 in dense remote whorls;

inner tepals oblong-lanceolate, oblong, or lingulate, 2–3 × 1–1.6(–2) mm, ca. 2 times as long as wide, base cuneate or truncate, margins entire, apex obtuse;

tubercles 3, equal or subequal, largest tubercle almost as wide as inner tepal.

usually dark reddish brown, 1.5–1.8 × 1–1.4 mm.

= 20.