This name is a synonym of Asphodelus fistulosus subsp. madeirensis Simon.
The record derives from WCSP
(data supplied on 2012-03-26)
which reports it as a synonym (record 275553) with original publication details: Bull. Soc. Bot. Deux-Sevres 1909: 54 1909.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:531515-1.
This name was in version 1 of The Plant List, record kew-275553, and has not been changed.