(C.japonica), Berlèse, 1837, Monographie, ed.1, p.128, “There is also a Grandiflora with
double flowers which is very handsome.” Le Texnier, 1922, p.34: “grown by Jean Casoretti,
gardener for Traversi of Desio near Milan, after 1830.” Synonym ‘Grandiflora Plena’.
Originated in Italy.