This taxon name is not current. The available references for this name are:
Najadaceae Juss. is more recently known as Hydrocharitaceae Juss.
Reason: See D.J. Mabberley in Mabberley's Plant Book Ed.3, 570(2008)
See also: A longer explanation of these and other terms in our Plant Names Primer.
A taxon name which is no longer current will retain its ‘Threatened’ status until publication of the next Wildlife Conservation (Rare Flora) Notice.