Not an accepted name (status: unknown). The accepted name is Acer cordatum Pax, 1889.

Acer cordatum var. microcordatum F.P.Metcalf, 1966 2% complete

No common name

Acta Phytotax. Sin. 11: 169 (1966)

There is no corrections for Acer cordatum var. microcordatum yet.