This name is a synonym of Hemerocallis minor Mill..
The record derives from WCSP
(data supplied on 2012-03-26)
which reports it as a synonym (record 277684) with original publication details: Bot. Mag. (Tokyo) 46: 121 1932.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:536371-1.
This name was in version 1 of The Plant List, record kew-277684, and has not been changed.