This taxon name is not current. The available references for this name are:
Festuca arundinacea Schreb. is more recently known as Lolium arundinaceum (Schreb.) Darbysh.
Reason See E.A. Banfi et al. in Taxon 66:709 (2017)
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A taxon name that is no longer current will retain its ‘Threatened’, ‘Extinct’, or ‘Extinct in the Wild’ status until a new name has been published in a Biodiversity Conservation Order.