Flora of North America species comparison

and leaf scales present.

and leaf scales present.

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

connate at base, ± linear, tapering strongly from near base or spatulate, 2.5–9 × 0.3–5 mm, 1+-veined.

bracts persistent.

bracts caducous, sometimes persistent.

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 1 staminate and 1 pistillate in 1 axil opposed by 1 pistillate;

styles erect or spreading;

pollen yellow.

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.

obovoid, usually widest distal to middle, 0.8–1.4 × 0.6–1.4 mm, longer than wide, sometimes as long as wide;

mericarps black, not swollen, not winged, winged only at apex, or winged throughout but widest at apex, wings straight, 0.03–0.1 mm wide.

= 40.

= 20.