Flora of North America species comparison

solitary or several from base, erect or ascending, branched in distal 2/3 (in inflorescence), 10–40(–45) cm.

erect, branched from above middle, 50–120(–150) cm.

blade obovate-oblong, ovate-lanceolate, oblong-lanceolate, or lanceolate; 2–6(–10) × 0.5–2 cm, base hastate (with spreading lobes), auriculate, or occasionally without evident lobes, margins entire, flat, apex obtuse or subacute.

ocrea deciduous or partially persistent at maturity;

blade lanceolate to narrowly lanceolate or lanceolate-linear, normally 15–30 × 1–4 cm, apex acute.

terminal, occupying distal 2/3 of stem, usually lax and interrupted, narrowly paniculate.

terminal, occupying distal 1/2 of stem, normally dense in distal part and interrupted at base, narrowly paniculate, branches usually straight or slightly arcuate.

articulated in proximal part, filiform, 1.5–2.5(–3) mm, articulation indistinct or slightly swollen.

articulated in proximal 1/3, filiform, 4–9 mm, articulation distinctly swollen.

3–6(–8) in whorls;

inner tepals orbiculate or broadly ovate, 2.5–3.2 × 2.7–3.2 mm, base broadly cordate or rounded, apex obtuse or subacute;

tubercles absent or some inner tepals with slightly swollen central veins.

15–25 in whorls, inner tepals orbiculate, ovate-orbiculate, or indistinctly reniform, 3.5–5(–6) × 3–5 mm, base slightly cordate, margins entire or rarely subentire to very weakly erose, undulate or nearly flat, apex obtuse or rounded, occasionally subacute;

tubercles normally absent, sometimes with 1 indistinct tubercle or slightly thickened midvein less than 1–1.3 mm wide, normally less than 2 times as wide as inner tepals.

brown or dark brown, 0.9–1.2 × 0.6–0.8 mm.

usually reddish brown, 2–2.5 × 1–1.5 mm.

= 8 (pistillate plants), 9 (staminate plants), 10 (both sexes).

= 40.