In autumn 2013, I have sowed some Monte Rosa OP seeds (128 from 5 fruits). The bush grows side by side with the centifolia, Tour de Malakoff whom I think, is known to be a tetraploid rose like many old garden roses. One plant among 7 seedlings obtained, and planted in 2014, had particular foliage while the others young plants had similar rugosa foliage like their mother. Moreover, it is only it that has flowered this summer (2015), but it is non-remontant. I think Tour de Malakoff is the father of this seedling (?!). As you can see on the photos below, it is a nice plant with the reddish small thorns, stipules and petioles, and it has a darker tone in the center of the flowers. This seedling seems to have inherited a variable tone and the nearly thornless stems similar at Tour de Malakoff. These later also, become purplish at the end of the season. This color of the stems is intriguing and probably come from the unknown background of Tour de Malakoff or Monte Rosa…? The foliage is a mix between both parents and the fruits, typical of rugosa, inherited from Monte Rosa. Can we really deduce, with these observations about this lucky seedling, that Tour de Malakoff could be the pollinator?
Because of this unexpected seedling, I have tried to pollinate Monte Rosa with the pollen of, another old garden rose tetraploid, James Mason with some results (3 fruits = 77 seeds). I have used also the same pollen this summer, on Roseraie de l’Haÿ (3 fruits = 113 seeds) and King J (3 fruits = 95 seeds), nice surprise also! Now, I must wait until next spring to see if something will happen with these sowings…!?