Diplotaxis sundingii is a species of flowering plants of the family Brassicaceae.

The species is endemic to Cape Verde.

[2] It is listed as a critically endangered plant by the IUCN.

[1] Diplotaxis sundingii is restricted to the island of São Nicolau,[2] where it occurs in mountainous zones in the east of the island, between 500 and 700 metres elevation.

[1] Its population size is estimated at less than 250 individuals.