Hesperis L.
Hesperis is a genus of ca. 25-45 species (depending on species boundaries), mostly native to Eurasia. Rather few species are cultivated as ornamentals in Europe (see Springate 1995) and only one is widespread in cultivation (Hesperis matronalis).
References
Ball P.W. (1993) Hesperis. In: Tutin T.G. & al. (eds.), Flora Europaea, vol. 1. (2nd ed.). Cambridge University Press, Cambridge: 336-337.
Bush N.A. (1970) Hesperis. In: Shishkin B.K. (ed.), Flora of the U.S.S.R., vol. VIII. Academic Scienc. U.S.S.R.: 181-187.
Cullen J. (1965) Hesperis. In: Davis P.H. (ed.), Flora of Turkey and the East Aegean Islands, vol. 1. University Press, Edinburgh: 452-460.
Dvorák F. (1966) A contribution to the study of the evolution of Hesperis series Matronales Cvel. emend. Dvorák. Feddes Repert. 73: 94-99.
Dvorák F. (1967) Hybrids of the genus Hesperis. Feddes Repert. 75: 67-88.
Dvorák F. (1968) Rod Hesperis v Ceskoslovensku. Biol. Pr. SAV, Bratislava 14(3): 1-54.
Dvorák F. (1973) Infrageneric classification of Hesperis L. Feddes Repert. 84(4): 259-271.
Mabberley D.J. (2008) Mabberley’s plant-book (3th ed.). Cambridge University Press, Cambridge: XVIII + 1021 p.
Springate L.S. (1995) Hesperis. In: Cullen J. & al. (eds.), The European Garden Flora, vol. 4. Cambridge University Press, Cambridge: 137.