This name is a synonym of Comastoma tenellum (Rottb.) Toyok..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Uppsala Univ. Årsskr. 7: 259 1945.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:369311-1.
This name was in version 1 of The Plant List, record kew-2822314.