This name is a synonym of Sophora unifoliata var. kanaioensis (Chock) O. Degener & I. Degener.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 13064813) with original publication details: Pacific Sci. 10(2): 156–157, f. 18c, d, 19 1956.
This name was in version 1 of The Plant List, record tro-13064813, and has not been changed.