This name is a synonym of Draba glabella var. pycnosperma (Fernald & Knowlt.) Mulligan.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Pflanzenr. IV, 105(89): 277 1927.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:83475-2.
This name was in version 1 of The Plant List, record kew-2776401, and has not been changed.