This name is a synonym of Yucca faxoniana Sarg..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 293066) with original publication details: Contr. W. Bot. 15: 59 1929.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:270283-2.
This name was in version 1 of The Plant List, record kew-293066, and has not been changed.