Flora of North America species comparison

erect to decumbent, dark green, apex never flexuous.

decumbent, trailing, or erect, green to gray-green, apex flexuous.

usually 3-foliolate, sometimes 3-lobed nearly to base;

petiole 7–18 mm;

leaflets: blade lanceolate, base acute, margins deeply and coarsely serrate, sinuses often extending 1/2+ to midvein, apex acute, central one 2.5–4 × 1–2 cm, lateral ones often with basal lobe.

petiole 3–10(–15) mm;

blade ovate to triangular-ovate, 0.9–2(–3) × 0.5–1.5(–2) cm, base deeply cordate, margins serrate, apex acute.

terminal (often appearing leaf opposed), glands absent, staminate flowers 10–20 per raceme;

staminate bracts 0.5–1.5 mm.

terminal (often appearing leaf-opposed), glands stipitate, prominent throughout, staminate flowers 10–30 per raceme;

staminate bracts 0.8–1 mm.

staminate 0.8–1.6 mm, persistent base 0.3–0.7 mm;

pistillate 2.5–3 mm in fruit.

staminate 2.2–2.4 mm, persistent base 1.8–2 mm;

pistillate 7–11 mm in fruit.

sepals 3–4, green, 1–1.4 mm;

stamens 3, filaments 3.5–4 mm.

sepals 3–4, green, 0.9–1.1 mm;

stamens 2–3, filaments 0.2–0.3 mm.

sepals lanceolate, 2–3 mm;

styles connate 1/4–1/2 length;

stigmas undulate to subpapillate.

sepals ovate, 1.5 mm;

styles connate 1/3–1/2 length;

stigmas undulate to subpapillate.

6–7 mm wide.

5 mm wide.

dark brown, 3–3.2 mm.

mottled brown-purple, 2.5–3 mm.