Flora of North America species comparison

erect, branched distal to middle or occasionally in distal 2/3, often with few flowering stems from rootstock, 60–120(–150) cm.

erect, branched in distal 1/2–2/3, 30–70(–100) cm.

ocrea deciduous to partially persistent at maturity;

blade oblong to ovate-oblong, sometimes broadly ovate, 20–40 × 10–15 cm, usually less than 4 times as long as wide, base normally distinctly cordate, occasionally rounded, rarely truncate, margins normally entire, flat or undulate, rarely slightly crisped, apex obtuse or subacute.

ocrea deciduous or partially persistent at maturity;

blade oblong-lanceolate, 20–30 × 5–10 cm, base cordate to broadly cuneate, margins entire, repand, flat or crisped, apex acute or attenuate.

terminal, occupying distal 2/3 of stem, usually lax and interrupted, narrowly or broadly paniculate, branches usually forming angle of 30–45° with 1st-order stem.

terminal, occupying distal 1/2–2/3 of stem, interrupted in proximal 1/2, paniculate, branched.

articulated in proximal 1/3 or rarely near middle, filiform, 2.5–8.5(–10) mm, articulation distinctly swollen.

articulated in proximal 1/3, filiform, distinctly swollen in distal part (near base of tepals, but not at articulation point), 4–14 mm, articulation weakly evident, not swollen.

10–25 in lax whorls;

inner tepals ovate-triangular, deltoid or, occasionally, lingulate, 3–6 × 2–3.5 mm (excluding teeth), ca. 1.5–2 times as long as wide, base truncate, margins usually distinctly dentate, rarely subentire, apex obtuse to subacute, straight, teeth 2–5, normally at each side of margin, short-subulate or triangular-subulate, straight, 0.5–1.8 mm, or shorter than width of inner tepals;

tubercle usually 1, sometimes 3, then 1 distinctly larger, smooth.

10–20 in whorls;

inner tepals oblong-ovate, 4–6 × 3–5 mm, base rounded to subcordate, margins entire, apex obtuse or subacute;

tubercles absent.

brown to reddish brown, 2–2.7 × 1.2–1.7 mm.

mature specimens not seen.

= 40.

= 120.