This is the classic flower-in-flower peony form, sometimes described as "two-stage double," some actually triple-stage, resulting in the most massive of peony flowers. Some of these also have the "all-over" stamen transformation of the Bombs, where no stamens can be found in the depths of the flower. When the individual instead carries "progressive transformation" of the stamen segments, there will be a more or less thin circle of natural stamens seen defining the inner margin of each component flower. Only rarely will carpels useable for breeding be found in these more massive flowers. Traditionally, pollen bearing stamens, when their presence is obvious, have been "frowned upon" for the doubles show classes.