This taxon name is not current. The available references for this name are:
Isopogon sp. Newdegate (D.B. Foreman 771) is more recently known as Isopogon nutans Rye & Hislop
Reason See B.L. Rye & M. Hislop in Nuytsia 31:95 (2020)
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A taxon name that is no longer current will retain its ‘Threatened’, ‘Extinct’, or ‘Extinct in the Wild’ status until a new name has been published in a Biodiversity Conservation Order.