Book  (2005)  Page(s) 90.  
 
location E:132M, Invertilis, ? , hybrid pimpinellifolia, carmine-red, medium size, single, moderate fragrance

Book  (1996)  Page(s) 109.  
 
R. x infertilis = 'Infertilis'. Bred by M. Vogel in Sangerhausen, since 1936 at the Arboretum of the Botanical Garden Berlin-Dahlem. R. pimp. x R. willmottiae.

Magazine  (1939)  Page(s) 60.  
 
Infertilis Hybrid pimpinellifolia (M. Vogel 1934)