Book  (Jan 1999)  Page(s) 25.  Includes photo(s).
 
[Photo of plant growing in the RHS gardens at Wisley] 'Lovely Rose', a hybrid between the species P. lactiflora and P. peregrina introduced to the USA by A P Saunders in 1942.

Book  Page(s) 22.  
 
Albiflora x lobata. I have used the following lobatas: lobata (Perry) usually so indicated. 5267. 4765. 8019. all seedling lobatas from their appearance.
9317-9504 188 Primevere x lobata (Perry) Rose Dream, Fortuna, Lovely R

Book  Page(s) 23.  
 
9317 - 9504 Primevere x lobata
9317 in 7.6 (1+4) 1934 June
9321 in 7.6 "Silky red" (3+7) said to be also in 8.5 but I cannot find it there
9324 in 8.18