Zencat said:Okay...chimera?
When an iris has environmental stresses during it's growth, such as late frost, it sometimes produces an unusual bloom, such as with four or more standards and falls as Bonnie mentioned, or sometimes two falls. It can also be blooms with their normal color pattern mixed up. These anomalies are called chimera.
Here are a few examples:
World Premier with half the fall the color of the standard instead:
Footloose with two standards and two falls:
And Again and Again with falls and very short standards (this was a rebloom in late November, definitely affected by cold):