Flora of North America species comparison

erect to trailing, dark green to light green, apex rarely flexuous.

erect to decumbent, dark green, apex never flexuous.

petiole 2–20 mm;

blade linear-lanceolate to narrowly ovate, 1–4 × 0.5–2 cm, base truncate to weakly cordate, margins serrate, apex acute.

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.

terminal (often appearing leaf opposed), glands few, sessile, staminate flowers 2–20 per raceme; staminate bracts 1.5–2 mm.

terminal (often appearing leaf opposed), glands absent, staminate flowers 10–20 per raceme; staminate bracts 0.5–1.5 mm.

staminate 0.7–2 mm, persistent base 0.4–1.5 mm; pistillate 2–2.5 mm in fruit.

staminate 0.8–1.6 mm, persistent base 0.3–0.7 mm; pistillate 2.5–3 mm in fruit.

sepals 3–4, green, 1–2.2 mm;

stamens 3–6(–10), filaments 0.3–1 mm.

sepals 3–4, green, 1–1.4 mm;

stamens 3, filaments 3.5–4 mm.

sepals lanceolate, 0.8–2.5 mm;

styles connate 1/3–1/2 length, long-exserted;

stigmas smooth to undulate.

sepals lanceolate, 2–3 mm;

styles connate 1/4–1/2 length;

stigmas undulate to subpapillate.

6–8 mm wide.

6–7 mm wide.

dark brown, 2.5–3.5 mm.

dark brown, 3–3.2 mm.

= 44.