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: Neptune Origins: a seedling of Prince Rurik variety. “Habit is quite similar to R. rugosa. Medium high. Stems are thick; the foliage is of a beautiful pale green colour. Blooms abundantly from spring until the snow in autumn. Buds are of a conic shape of medium length, black-reddish colour. Blooms are large, of reddish-blue- slate colour. Very rare unparalleled colour. The variety is “definitely hardy”.