Flora of North America species comparison

erect to decumbent, dark green, apex never flexuous.

erect, purple-green to reddish black, apex never 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 1–5 mm;

blade oblong to oblanceolate, 3–7 × 1–2.8 cm, base acute to obtuse, margins coarsely serrate, teeth apices often somewhat recurved, apex acute.

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

staminate bracts 0.5–1.5 mm.

terminal (appearing leaf opposed), glands absent, staminate flowers 2–5 per raceme;

staminate bracts 1–2 mm.

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

pistillate 2.5–3 mm in fruit.

staminate 1.3–1.6 mm, persistent base 0.2–0.4 mm;

pistillate 2–3 mm in fruit.

sepals 3–4, green, 1–1.4 mm;

stamens 3, filaments 3.5–4 mm.

sepals 3–4, green, 1.5–2.5 mm;

stamens 4–5, filaments 0.7–1.3 mm, connate 1/2 length.

sepals lanceolate, 2–3 mm;

styles connate 1/4–1/2 length;

stigmas undulate to subpapillate.

sepals rhombic-lanceolate, 1–4 mm;

styles connate 1/4 length;

stigmas undulate.

6–7 mm wide.

6–7 mm wide.

dark brown, 3–3.2 mm.

dark brown, 2.5–3.2 mm.