This article is from the Rose Gardening FAQ, by Bill Chandler chandler@austin.ibm.com, Jolene Adams jolene@cchem.berkeley.edu, Brent C. Dickerson odinthor@csulf.edu, Karen Baldwin kbaldwin@veribest.com, and many contributors
These crosses between Chinas, Bourbons, Noisettes, and the old European
sorts (Gallicas, etc.) were made initially as an attempt to deal with
the lack of hardiness of these new sorts with R. chinensis background.
The outcome was quite varied. The results are not absolutely clear,
because offspring close to the, say, Gallica parent would be sold as a
Gallica, and offspring close to the, say, China parent would find
itself sold as a China; thus, many of these hybrids, produced in the
1820's and 1830's primarily, masquerade as something they are not
genetically. The important thing, however, is that, due to the laws of
genetics, almost the entirety of these are once-bloomers--but often
blooming that one time a season with the most extreme profusion and
beautiful fragrant flowers. The plants are most often climber-like and
of the most extreme vigor, frequently heavily foliated. Novices and
others must be careful to distinguish between (once-blooming) Hybrid
Chinas and (repeat-blooming) China hybrids; (once-blooming) Hybrid
Bourbons and (repeat-blooming) Bourbon hybrids; (once-blooming) Hybrid
Noisettes and (repeat-blooming) Noisette hybrids. `George IV', `Belle
de Crecy', `Duchesse de Montebello', `Mme. Plantier', `Triomphe de
Laffay', `Comtesse de Lacepede', `Las-Cases', `Malton'.
 
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