Arabis retrofracta var. collinsii (Fernald) B. Boivin

Arabis retrofracta var. collinsii (Fernald) B. Boivin is a synonym sensu FNA Ed. Comm., 2010 of:

Boechera collinsii (Fernald) Á. Löve & D. Löve, an accepted species name sensu FNA Ed. Comm., 2010.