Character

Sagittaria latifolia

Sagittaria longiloba

Sagittaria montevidensis

fruit size

beak shape

2.3–3.5(4) mm long
x 1.5–2.5(3) mm wide

beak horizontal,
tip curved down

1.2–2.5 mm long
x 0.8–1.6 mm wide

beak vertical,
tip curved up

1.8–2.5(4) mm long
x 0.7–1.7 mm wide

beak horizontal,
tip curved up