Flora of North America species comparison

and leaf scales present.

and leaf scales absent.

connate at base, ± parallel-sided, 5.2–9.1 × 0.1–0.9 mm, 1+-veined.

not connate at base, ± linear tapering from base, 5.9–11.3 × 0.3–1.1 mm, 1-veined.

bracts persistent.

bracts absent.

0–0.5 mm in fruit.

0–0.2 mm in fruit.

usually 1 staminate and 1 pistillate in each axil;

styles spreading;

pollen yellow.

usually solitary or 1 pistillate and 1 staminate in an axil;

styles reflexed or strongly curved;

pollen colorless.

1–1.2 × 1.1–1.3 mm, ± as long as wide;

mericarps black, not swollen, evenly winged throughout, wings straight, 0.05–0.1 mm wide.

0.8–1.2 × 0.9–1.3 mm, as long as or shorter than wide;

mericarps brown or gray-brown, not swollen, winged throughout, wings straight, 0.05–0.1 mm wide, width less than mericarp body.

= 40.