Not an accepted name (status: unknown). The accepted name is Trapa natans var. quadricaudata (Glück) B.Y.Ding & X.F.Jin, 2020.

Trapa natans var. pumila Nakano ex Verdc., 1986 2% complete

No common name

Kew Bull. 41: 448 (1986)

There is no corrections for Trapa natans var. pumila yet.