This name is a synonym of Boechera sparsiflora var. subvillosa (S.Watson) Dorn.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Man. Bot. Rocky Mt. ed. 2: 228 1909.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:17170-2.
This name was in version 1 of The Plant List, record kew-2646027, and has not been changed.