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.

branched from base or near base, occasionally simple, slender, 5–50 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;

blade spatulate, lanceolate, or ovate-lanceolate, 1–5(–8) × (0.5–)1–2.5 cm, base cuneate, rarely rounded, margins normally entire, flat, apex obtuse.

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

terminal, simple, racemose, occupying most of stem, interrupted, linear.

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

usually distinctly heteromorphic (much thickened distally), 4–7(–10) mm;

others less than 4 mm.

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.

2–3(–4) in lax clusters (reduced whorls);

inner tepals variable, often heteromorphic, triangular, narrowly triangular, ligulate, or ovate-oblong, (1.5–)2–4(–5) × (0.5–)1–3 mm (excluding teeth), base truncate, margins usually dentate, sometimes entire, apex obtuse or acute, usually not hooked, teeth 2–4(–8), at each side of margins, slender, straight or hooked, 0.3–1 mm;

tubercles absent, or 3, usually represented by minute swellings barely recognizable as tubercles.

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

brown to dark brown, 1.3–2.3 × 0.7–1.4 mm.

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

= 16.