Flora of North America species comparison

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

erect, purple-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.

petiole 1–4 mm;

blade orbiculate to elliptic, 2–5 × 0.8–3 cm, base acute, margins serrate to crenate, apex acute to blunt.

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 4–11 per raceme; staminate bracts 0.8–1.2 mm.

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

staminate 1.5–1.9 mm, persistent base 0.4–0.6 mm; pistillate 2.8–3.4 mm in fruit.

sepals 3–4, green, 1–2.2 mm;

stamens 3–6(–10), filaments 0.3–1 mm.

sepals 4–5, green, 0.9–1.5 mm;

stamens 2, filaments 0.2–0.5 mm.

sepals lanceolate, 0.8–2.5 mm;

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

stigmas smooth to undulate.

sepals lanceolate, 1.3–2.3 mm;

styles connate 1/4 length;

stigmas undulate.

6–8 mm wide.

9–13 mm wide.

dark brown, 2.5–3.5 mm.

dark brown with light brown streaks, 4–4.5 mm.

= 44.

= 44.