Immeasurably important rose considering not only that it begat Queen Elizabeth lines (and appears in many 60's-70's miniatures along with R. Wichuriana), but also the clear vermillion color, very unique for 1945. Foliage is lovely: bright and glossy, the plant often produces huge trusses of bloom and the scent is notable for me, rather spicey. Downside is the addiction to blackspot. Tantau was known for not disclosing a lot of his breeding parentages and I have always wondered if the cross that resulted in Floradora was not more complex, Baby Chateau x R. Roxburghii SEEDLING or something. Seems very odd that with that father as listed the plant would look so modern, everything about it, and that there wouldn't have been some non-recurrent grandchildren (Queen E's generation).....??? Does anyone have any opinions on this or any information?

Origin and Breeding
Controlled pollination: 'KORjupvio' was the resultant seedling from a cross between an unnamed seed parent with another unnamed seedling (MACgenev x unnamed seedling) in May 2008 at the breeding facility of W. Kordes Sohne in Sparrieshoop, Germany. The seedling was selected in May 2009 and was budded onto Rosa canina planted in the open field. Follow up selections took place in 2010 and 2011and was commercially introduced into Europe in September 2018. All breeding and selection processes were conducted by or under the supervision of Wilhelm-Alexander Kordes. Breeder: Wilhelm-Alexander Kordes, W. Kordes' Sohne Rosenschulen GmbH & Co KG, Offenseth-Sparrieshoop, Germany.

-quote from AUS patented already cited.

This one is interesting. That likely pollen parent has been used before, as well as the codename Vio, which is usually for 'Violina'. Maybe the unspecified "seedling" :P

Edit: I think it is possibly Violet Parfume x (Caramel Fairy Tale x New Zealand). I know Kordes also uses Violina and Claude Brasseur for their larger violet type roses in recent years, but I think its Violet Parfume in this case. We'll never know, of course ;]

Looking at the stems, foliage, and timing, I suspect the unknown portion of the parentage is not a typical floribunda. It seems to have a lot in common with other floribundas and shrubs of this Kordes era. Which may be why Magenta was a better plant than most of its time.

This rose has an upright habit, much like a dwarfed version of 'Therese Bugnet'. The canes are very winter hardy even in zone 4 and have a nice purple coloration over winter it also inherited from its dad. It blooms abundantly throughout the growing season. Depending on the weather the blooms can appear a lighter mauve or purple. Often there are white streaks down some of the petals. It won a silver certificate in the American Rose Society American Rose Center Trials in Shreveport, Louisana. It has proven itself in the North and through this test also in the South.