Inflorescence slices of tall bearded iris (Iris sp.) regenerated callus in vitro on a modified Murashige-Skoog high salt medium supplemented with 2.5 mg/liter napthaleneacetic acid (NAA) and 0.5 mg/liter kinetin. Callus pieces transferred to light initiated plantlets at their periphery and produced fuU-sized, true-to-type flowering plants when transplanted to soil.
Received for publication May 22, 1975. Contribution from the Dept. of Horticulture and Illinois Agr. Expt. Sta., Project No. 65-364. Charles Klehm & Son Nursery, Arlington Heights, Illinois and Schreiners Gardens, Salem, Oregon donated iris rhizomes for this research.
Associate Professor of Nursery Management, University of Illinois.
Associate Professor and Professor of Horticulture, Oregon State University, respectively.