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 or rarely ascending, 1 to several from base, branched in distal 1/2 (in inflorescence), (25–)30–90(–110) 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 normally laciniate;

blade oblong-ovate, ovate-lanceolate, to lanceolate, 4–10(–15) × 1–4(–6) cm, normally more than 2.5 times as long as wide, base sagittate (with acute lobes directed downward, ± parallel to petiole), margins entire, normally flat, apex acute or subacute.

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

terminal, occupying distal 1/3 of stem, usually lax and interrupted especially in proximal part, narrowly paniculate, cylindric (with 1st-order branches simple, or with few 2d-order branches).

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

articulated near middle, filiform, 2–5(–6) mm, articulation distinct.

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.

(2–)4–8(–10) in whorls;

inner tepals orbiculate, occasionally broadly ovate, 3–4(–5) × 3–4 mm, base rounded or cordate, apex obtuse;

tubercles small or occasionally absent.

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

black to dark brown, 1.8–2.5 × 1.2–1.5 mm, shiny, smooth.

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

= 14 (pistillate plants), 15 (staminate plants).