before 1920, Perry
'Cengialti Purpurea' (Amos Perry, 1920) TB, Color code-B2D (Dark blue self). Fragrant. Variety superseded. No longer in commerce by 1939.
See below:
Journal of The Royal Horticultural Society 53: Pt. 1, p.131 January 1928 trials.
Peckham, E. (Ed.). (1940). Alphabetical iris check list: 1939. The American Iris Society.
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