Euphrasia hyperborea
Synonymy
Source: Marhold, K. (2011+): Euphrasia. – In: Euro+Med Plantbase - the information resource for Euro-Mediterranean plant diversity.
Euphrasia hyperborea in Bergens Mus. Årbog (Årbok) 1916/17: 255. 1919
Content
Bibliography
B. 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