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Iochroma cyaneum 'Royal Blue'
Accepted name Iochroma cyaneum 'Royal Blue' Synonyms Distribution Description When first open, the flowers of I. cyaneum ‘Royal Blue’ (Fig. 2) are RHS violet-blue 93A flowers that lighten 90C. ‘Royal Blue’ has a longer calyx than 'Indigo' or 'Sky King'. References Meerow et al 2004 Comments Said to have been obtained by Michael Kartuz "before 1993".