"`KORbaymun` is a seedling selection which resulted from the controlled pollination of Rosa hybrida `KORschwill` (U.S. Plant Pat. No. 23,122), the seed parent, and Rosa hybrida `MACcastler` (unpatented), the pollen parent, during the summer of 2007. As part of a rose development program, Tim-Hermann Kordes germinated seeds from the aforementioned hybridization during the following winter and conducted evaluations and observations on the resulting seedlings in a controlled environment in Klein Offenseth-Sparrieshoop, Germany. The resulting seedlings exhibited distinctive physical and biological characteristics. The new rose plant was selected as a single plant in May of 2008 from the seedling beds due to its superior characteristics and asexually propagated for further evaluation. This new and distinctive rose variety was given the name `KORbaymun`. " -US PP29,466