Tantau's trademark Information is confusing. For 'Baronesse' it states: I. Marke Nr. 538 591 Ecuador Wz. Nr. 0224147 Tan97094 EdV Sort protection in: EU, Japan
For 'Mariatheresia': D. Marke Nr. 302 62 570 EU Marke Nr. 011 570 314 Sort Name: Tan97094 Sort protection in: EU, Japan, Ecuador
Tan97094 EdV denotes 'Baronesse' is a sport of 'Mariatheresia'. In one listing we also have Tan96201 for 'Mariatheresia' which increases the confusion. For their newer roses Tantau does not publish beeder codes at all, which makes it more difficult to kep track of the rcycling of names.