1933, Van Tubergen
'Dirk Verbeek'(Van Tubergen, 1933) Dutch Iris; Color code Subgenus Xiphium; Dutch Iris; Color code S3L rev.;
See below:
Journal of the Royal Horticultural Society 58: Pt. 2, 405-408. September 1933 Bulbous Iris Trials. |
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-- Main.RPries - 2011-03-07