This taxon name is not current. The available references for this name are:
Billardiera drummondiana (Putt.) E.M.Benn. is more recently known as Marianthus drummondianus (Putt.) Benth.
Reason See L.W. Cayzer & M.D. Crisp in Austral.Syst.Bot.17:132(2004)
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A taxon name that is no longer current will retain its ‘Threatened’, ‘Extinct’, or ‘Extinct in the Wild’ status until a new name has been published in a Biodiversity Conservation Order.