Newsletter  (Jul 2012)  Page(s) 44-45.  
 
p. 44: Among the varieties of his [Michurin's] selection (Noble, Buketnaya, Bicolorous, Zarya Vostoka, Sister of Dawn, Brother of Dawn, Double White, Kerb Pink, Kerb White, Lawny, Mother of blue, Mother of yellow, Mother of climbing, Svetlana, Tatyana Michurina, N.I. Kichunov, Neptune, Prince of Varangians, Prince Rurik, Cream, Fairy, Tsarina of Light, Ceres, etc.), many carried the genes of this species [Rosa rugosa].

p. 45: Prince Rurik Origins: a seedling of varieties Prince of Varangians, pollinated with own pollen. “The whole habit of the plant and blooms is quite similar to R. rugosa except for the dark colour of its medium sized semi-double flowers. Currently, I don’t have this variety; in autumn 1896 it disappeared without trace after a visit of a foreign lover of roses to the nursery, luckily I had gathered the first fruits of it. “