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 above middle, 60–100 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 mostly deciduous or sometimes partially persistent at maturity;

blade usually ovate-orbiculate, sometimes orbiculate or broadly ovate, 20–40 × 20–35 cm, base deeply and widely cordate, margins entire, flat or slightly undulate, apex obtuse.

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 of stem, rather dense, widely paniculate to fusiform.

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

articulated at middle or in proximal 1/3, filiform, 3–9 mm, articulation distinctly 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 or ovate-triangular, 4–5(–6) × 3–5 mm, base truncate or slightly cordate, margins entire or subentire, apex obtuse or subobtuse;

tubercles absent.

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

brown to brownish green, 2.5–3.5 × 1–2 mm.

= 40.

= 20.