Viola ambigua subsp. campestris (M. Bieb.) Gams in Hegi, Ill. Fl. Mitt.-Eur. 5: 643. 1925
Viola ambigua subsp. campestris in Hegi, Ill. Fl. Mitt.-Eur. 5: 643. 1925
is new combination for Viola campestris, Fl. Taur.-Cauc. 1: 171. 1808
Viola ambigua subsp. campestris in Hegi, Ill. Fl. Mitt.-Eur. 5: 643. 1925