Book  (2008)  Page(s) 747.  
 
In Germany, a much used cultivar has been Die Pillnitzer Vitaminrose 'PiRo 3', a hybrid between R. dumalis and R. pendulina. This cultivar has a very high vitamin C content, 1200 mg/ 100 g fruit flesh, and has been grown mainly in Germany together with genotypes of R. villosa subsp. pomifera cv. 'Karpatia' from Slovakia (Albrecht, 1993).

Book  (2001)  Page(s) 445.  
 
From the crossing R. dumalis Bechst. x R. pendulina var. salaevensis (Rap.) R. Keller the cultivar 'Vitaminrose Piro 3' was selected in Germany, cultivated in central Germany and Netherlands on a rather large scale.

Book  (1999)  Page(s) 135.  
 
Pillnizter Vitamin Rose 'Pi-Ro 3': Not all roses have the same high level vitamin C content. also, a high quantity of usable fruit flesh does not necessarily correlate with a large vitamin content. Therefore, in places such as Russia and the former East Germany, people have for many years sought strenuously to select forms of vitamin roses that combine the two factors, quantity and quality. They have found the group of Pillnizter vitamin roses, from which the selection 'Pi-Ro 3' comes very close to the desired ideal. In free-growing, decorative hedges, this shrub rose, which is produced from the native variety Rosa pendulina, displays a lush burst of flowers in spring and an abundance of hips in the fall.