This name is a synonym of Dasylirion texanum Scheele.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 303994) with original publication details: Proc. Amer. Philos. Soc. 50: 434 1911.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:76821-2.
This name was in version 1 of The Plant List, record kew-303994, and has not been changed.