Diplotaxis glauca is a species of flowering plants of the family Brassicaceae. The species is endemic to Cape Verde. It is listed as a critically endangered plant by the IUCN. The plant was named by Otto Eugen Schulz in 1916. The local name of the species is mostarda-brabo (wild mustard), a name that may also refer to the related species Diplotaxis gracilis.
Diplotaxis glauca is restricted to the islands of Sal and Boa Vista.