TB M B1M
From Cooley’s Gardens catalog for 1948: “Very large flower of cornflower-blue, softened by a silvery overtone. The large standards are arched and domed, the broad falls are semi-flaring with smoothly colored hafts. Growing from 3 to 4 feet in height, perfectly branched, we consider it just about tops in blue iris.”
(Annabel X Blue Zenith), HM 1945, AM 1947, Dykes Medal 1950.