Euro+Med: Faroe islandsnativeA; FinlandnativeA,B; Great BritainnativeB; IcelandnativeA,B; Ireland, with N IrelandnativeA (IrelandnativeB); NorwaynativeA,B; RomanianativeC; RussianativeB; SwedennativeB
Bibliography
A.Tutin, T. G., Heywood, V. H., Burges, N. A., Valentine, D. H., Walters, S. M. & Webb, D. A. 1964–1980: Flora europaea 1-5. – Cambridge: Cambridge University Press
B.Jalas, J. & Suominen, J. 1999: Atlas Florae Europaeae 12
C.Ciocîrlan, V. 1988: Flora Ilustrata a României 1. – Bucureşti: Editura Ceres