Friends: Iris 'Daranus' Van Tubergen, an undated hybrid between I. korolkowii ( Section Regelia) x I. iberica (Section Oncocyclus). The Van Tubergen Nursery Ltd, and Zwanenberg Nurseries in Haarlem, Holland. specialized in Regeliocyclus hybrid iris and introduced dozen of still popular cultivars. Most of these date to the period from 1900-1920. This courtesy of the American Iris Society/ SIGNA cultivar checklist and Bob Pries. Best Jim W. ps Cultivation info on the web site of the "Aril Society International" -- Dr. James W. Waddick 8871 NW Brostrom Rd. Kansas City Missouri 64152-2711 USA Ph. 816-746-1949 Zone 5 Record low -23F Summer 100F +