pre 1950, Unknown
The cultivar found in the trade today is not the registered cultivar 'Zebra' which had white flowers striped blue. Apparently that cultivar has disappeared and a variety of Iris pallida with yellow striped foliage has assumed this name. The first promotion of the new 'Zebra' seemed to be in the old Lloyd Austin Catalogs of his Rainbow Gardens. It has become a popular plant with landscapers in some parts of the USA. A close relative is 'Argentea' which is a pallida with white striped foliage.