Geranium robertianum subsp. purpureum (Vill.) Nyman, Consp. Fl. Eur.: 138. 1878
Geranium robertianum subsp. purpureum, Consp. Fl. Eur.: 138. 1878
is new combination for Geranium purpureum, Hist. Pl. Dauphiné 1: 272. 1786
Geranium robertianum subsp. purpureum, Consp. Fl. Eur.: 138. 1878