This name is a synonym of Arabidopsis lyrata subsp. kamchatica (Fisch. ex DC.) O'Kane & Al-Shehbaz.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Fl. Sibir. Orient. Extr. 25: 465 1926.
This name was in version 1 of The Plant List, record kew-2645793.