This name is a synonym of Yucca gloriosa var. tristis Carrière.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 293044) with original publication details: Trans. Acad. Sci. St. Louis 3: 39 1873.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:270366-2.
This name was in version 1 of The Plant List, record kew-293044.