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'Floradora' rose Reviews & Comments
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Initial post
1 JUL 13 by
 goncmg
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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?
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I too have been a bit interested in 'Floradora' but it has never come my way. I've spent an hour or so gathering reference page numbers for both 'Floradora' and 'Floradora Cl.' in case I ever get the impetus or need to look closer at the rose.
In the 1950 'Australian Rose Annual', C. H. Isaac, Victoria. said the parentage of 'Floradora' was 'Baby Chateau) (Hyb Poly) x Rosa Multibracteata (Species). So far it was the only mention of a parentage I've seen, but my search has only been a perfunctory one.
Patricia
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If I had to guess, I would hypothesize that the Rosa roxbughii pollen was not truly accepted, and that it prompted the female parts of 'Baby Chateau' to double itself into fertile seed. I have used a relative of R. roxburghii on 'Belle Epoque', which was pollinated between rains, removed of any male parts prior to pollen release, and then covered. The likelihood of impurity was really low, and the likelihood of an impure seed germinating was even lower. The only surviving seedling came out as a near clone of 'Belle Epoque', except strong in color, completely seed sterile, and extremely thin. It was a very weird occurrence. Vigor was oddly strong.
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#3 of 9 posted
27 OCT 15 by
goncmg
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Really interesting, Michael! Looking at Floradora I think you may have nailed it!
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#4 of 9 posted
1 FEB 18 by
CybeRose
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Michael,
Another possibility is that Floradora and its siblings are partial hybrids. Pollination occurs in the usual way, but the paternal chromosomes are mostly eliminated. This phenomenon has been observed in other genera, such as Helianthus, Solanum, etc.
Wulff (1954) wrote: "There is another remarkable fact to note. Without going into details I may state here that the three roses 'Floradora', 'Käthe Duvigneau', and 'Cinnabar', as well as the hybrid 46534, did not show any traces of the male parent Rosa Roxburghii in their morphology. The first three roses are true hybrid polyanthas, the latter is a true hybrid tea, indicating thus that the genes which are responsible for the respective characters of growth habit and for many characters of shape and size of flowers, fruits, leaves and spines are dominant to the allelic genes of R. Roxburghii. Only anatomical studies revealed a certain similarity and relationship to the latter species."
It would have been helpful if he had given us more information about those anatomical studies.
Karl
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Hi, Karl,
Interesting. You're right. That just begs for more information, with questions to follow.
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#6 of 9 posted
3 FEB 18 by
CybeRose
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Michael,
I have a list of possible examples of partial hybridization ... some old, some new ... that are suggestive at least.
If you are interested in the subject.
http://bulbnrose.x10.mx/Heredity/King/ExceptionalCrosses.html
Karl
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Thank you!!!
I bookmarked them for nighttime hours.
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link.springer.com/article/10.1007/s001220100746
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#9 of 9 posted
3 SEP 21 by
Plazbo
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I agree with the more info about those anatomical studies would have been nice. I've not found the thorns to be particularly recessive with my Baby Faurax x R. Roxburghii Normalis seedlings. Granted they are still quite young and may change but they look more rox hybrid (growth shape) than Baby Faurax. Will be interesting to see what happens with the flowering and hips when they mature enough. Flakey bark (not just browning/woody like in this picture attached) seems to be appearing on some of them around the base where they are thickest (all still very thin wood, small plants) but I may be jumping the gun on that.
I can't put too much focus on the leaflets, while BF typically has 5-7 and the seedlings 9-11, 9 isn't out of the typical realm for multiflora....may increase with maturity, will find out sooner or later.
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The American Rose (Oct. 1974) p. 14
"To Touch a Rainbow"
(Creating New Miniatures)
Ralph S. Moore of Sequoia Nursery
"Floradora — used mainly for its vigor and color (this rose has R. roxburghii in it) and because it will root easily."
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This rose returned in my zone 4/5 garden. It is planted next to STW1 and both breeder roses seem to like each other's company.
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I don't have this rose and am not really looking to have one, but it just fascinates me. This plant and all its sisters made by Tantau in 1941/42 have been exceptionally influential in the development of roses. And such an odd cross to make! To think we got Floradora and all she begat (including Queen Elizabeth), Cinnabar (aka Tantau's Triumph), and Kathe Duvigneau, not to mention all the sib crosses that gave us other great roses, like Buisman's Triumph and Anneke Doorenbos! This simple cross -- Baby Chateau x roxburghii -- which no one today would even consider making -- opened the door to amazing roses.
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