This taxon name is not current. The available references for this name are:
Brassica oxyrrhina (Coss.) Willk. is more recently known as Brassica barrelieri subsp. oxyrrhina (Coss.) P.W.Ball & Heywood
See also: A longer explanation of these and other terms in our Plant Names Primer.
A taxon name that is no longer current will retain its ‘Threatened’, ‘Extinct’, or ‘Extinct in the Wild’ status until a new name has been published in a Biodiversity Conservation Order.