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, 40–85(–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 to lanceolate, 20–35 × 5–12 cm, base cordate to broadly cuneate, margins entire or nearly so, flat, 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, 12–20 mm, 3–4 times as long as inner tepals, 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 ovate-triangular, 4–5(–6) × 3–4(–5) mm, base truncate to subcordate, margins entire, apex acute to subacute;

tubercles absent.

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

brown, 3 × 1.5 mm.

= 40.

= 120.