It's stated that this rose is a hybrid of rugosa. But what is it crossed with? Rosa chinensis? Or is it just a common consensus that it is a hybrid rugosa instead of just pure rugosa?
But then, wouldn't it be more reasonable to clases it a pure Rugosa? There is no indication that it is crossed with anything else so it's a garden form of the species for what we know.
Hybrid Rugosa would be correct for a rose with Rugosa genetics, but also from other rose species.
It would be as classing Charles de Mills as an hybrid Gallica instead of pure Gallica. It would cuase confusion, making people think it has more than one species in its makeup.
Oh sorry, I didn't read you correctly the first time! My bad. Though I guess it can't be changed, at least not immediately, it would be better in the future to have a category that is just Rugosa per se, and not hybrid Rugosa. It had actually made me think in the past all garden Rugosas where maybe hybrids with, for example, the tea rose. Thanks for clearing this up for me, because it makes much more sense to think it's just a domesticated form of the species rose, looking at the bush and taking into account also what the member JJS's reply says.
Interesting question. Graham Thomas remarked that Hansa shows signs of hybridization, so I tried to find out by selfing Hansa a few years ago. The result was about 50/50 double blooms / single blooms. Moreover, in about half of the offspring the new growth and the petioles were reddish, whereas in the other half they were green. In all cases I would classify the roses as pure rugosas. Also the hips were purely rugosa. So far, my best guess is that Hansa is a cross between R. rugosa and R. rugosa flore pleno. But who knows?
That is a very interesting experiment you did there! Thanks for the info, and it does go along this idea I have that it's just a pure Rugosa of a domesticated form.
Hi, I was wondering if anyone would be able to please help me identify this rose. It is growing in the location of SG56 C09 Rex Hazlewood Rose Garden. It is meant to be the rose Hansa. I have been able to identify a couple of true Hansa Canes (picture on rose page) which have been completely swamped by this rose. This rose has spread an easy 5 to 7m within the garden bed. It shares the garden bed with, R. rugosa alba, Schneezwerg, Blanc Double de Courbert, F.J. Grrotendorst, Fimbriata, Sarah van Fleet, Belle Poitevine, Roseraie de l'Hay and Fru Dagmar Hartopp. Does any one recognise this rose, or is it also possible it has self seeded / reverted to a parent rose etc. If I am unable to identify it, is it acceptable to use Rugosa species, Unknown for a sign. Thankyou.
Veilchenblau’s thought of R. rugosa is good. The sign. I don’t know. But it could be a seedling of a rugosa hybrid - there are so many of the single purple rugosas out there. I would be inclined to use.....Rugosa, unknown.
Hi Patricia, That would be great if you could create a study file. I have not yet entered any data for a plaque for this rose. Rex Hazlewood SG56 C09. Any information / feedback would be wonderful. Thanks, Nadene
Study file "Hazlewood SG56 C09" added and photos moved. Unfortunately I am unable to move the comments. If there is any information above that would help in the identification, just copy and paste and do a comment in the new file.
Definitely! Provided you haven't used pesticides. Rose hips have a very high Vitamin C content (up to 3000 mg/100g). For comparison: Lemon has 60 mg/100g. Rosa rugosa is in the range of 400-1000 mg/100g. Higher contents you can find in e.g. in Rosa pendulina, R. dumalis, E. majalis or R. tomentosa. .
The full name of the originator of this rose is Karl Ludwig Johannes Schaum. Born January 21/1868 in Langenhennersdorf, Germany. Died January 30/1928. His wife, Cornelia van Tol, came from a family having a nurserymen tradition. Cornelia's father, Andries van Tol, was likely Karl's partner in the Schaum & van Tol nursery business.
