This taxon name is not current. The available references for this name are:
Lolium multiflorum × rigidum is more recently known as Lolium ×hubbardii B.K.Simon
Reason See B.K. Simon in Austrobaileya 2:21 (1984)
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A taxon name that is no longer current will retain its ‘Threatened’, ‘Extinct’, or ‘Extinct in the Wild’ status until a new name has been published in a Biodiversity Conservation Order.