Flora of North America species comparison

erect to trailing, green to whitish green, apex never flexuous.

decumbent, twining, or erect, light green, apex usually flexuous.

petiole 10–40 mm;

blade triangular-lanceolate to triangular-ovate, 1.5–6 × 1–3.5 cm, base cordate to truncate, margins serrate, apex acute.

petiole 6–38 mm;

blade triangular to cordate, 1.9–6 × 1.5–3.5 cm, base truncate to cordate, margins serrate to crenate, apex acute.

terminal (often appearing leaf-opposed), glands absent, staminate flowers 15–80 per raceme, distally clustered; staminate bracts 1–2 mm.

terminal (often appearing leaf-opposed), glands absent, staminate flowers 2–8[–10] per raceme; staminate bracts 1–1.8 mm.

staminate 0.7–1 mm, persistent base 0.3–0.6 mm, shorter than subtending bract; pistillate 3–4 mm in fruit.

staminate 0.7–2 mm, persistent base 0.4–1.5 mm; pistillate 2–4 mm in fruit.

sepals 3–4, green, sometimes red-tinged, 1.2–2.3 mm;

stamens 3(–4), filaments 0.4–1 mm.

sepals 3–4[–5], green, 1–1.5 mm;

stamens 3–4(–5), filaments 0.3–0.6 mm.

sepals lanceolate, 1.8–5 mm;

styles connate 1/3 length;

stigmas papillate.

sepals ovate, 1.3–3.5 mm;

styles connate 1/3 length;

stigmas subpapillate to undulate.

7–9 mm wide.

6.5–7 mm wide, often 1 carpel maturing.

dark brown with light brown streaks, 3–4 mm.

dark brown, 2.5–3.8 mm.

= 44.