This name is a synonym of Balduina uniflora Nutt..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 59C7014C-45F2-4453-B7D6-9B16875E90BA).
This name record (from TICA) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Balduina uniflora in version 1 of The Plant List.