I put that name in double quotes because its not a species, but a hybrid between two species: R. soulieana and R. foliolosa. The idea here is to create something entirely new and distinct, using two diploid species with excellent hardiness and vigor. With luck, these seedlings will not suffer from the typical fungal disease either; the elimination of disease is a major goal for me now. Not disease tolerance, something the plants can live with and still survive, but something closer to true immunity. I have spent the Summer digging out and discarding numerous "collectible" Hybrid Teas and Shrubs that simply will not thrive without chemical intervention. My patience has run out: I don't want to grow any more "life support roses". (Today, 'Dame Edith Helen's head is on the chopping block. It is likely that 'Papageno' is next: off with their heads!)
The seedling's foliage is fragrant when touched, giving off a combined scent of Frankincense and Raspberries! It is pretty clear that this one is going to be vigorous and a semi-climbing plant, whereas its sibling more closely resembles its R. foliolosa parent, remaining more shrubby. No flowers yet, but then I don't expect to see any till next Spring. There is always the possibility that this cross (I have two seedlings, this is just one) will not have fertility to breed another generation, but I have a hunch it will be. I have another hybrid that is a diploid breeder (42-03-02) out of Moore's 0-47-19 (R. wichurana X 'Floradora'), crossed with an R. rugosa hybrid, which will have the ability to pass on remontancy while remaining a diploid. I'm trying to avoid getting into triploid territory for now, just to make things easier to deal with.
I will post photos of the 42-03-02 X R. rugosa seedling soon. It shows considerable Rugosa influence in its foliage.