This name is a synonym of Pycnoplinthus uniflorus (Hook. f. & Thomson) O.E. Schulz.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50204358).
⥇ A cross-taxon basionym link was ignored while processing this record,
see Braya uniflora Hook.f. & Thomson.
This name was in version 1 of The Plant List, record tro-50204358, and has not been changed.