Book  (1959)  Page(s) 243.  
 
De bekende rugosa-onderstam is een bastard, waarschijnlijk R. rugosa x plaustris of virginiana; bloemen klein, lichtrose; hiervan bestaan selecties b.v. 'Spek's Improved' (Spek), met kleine, half gevulde bloemen.

Translation:
The well-known rugosa understock is a crossing, probably of R. rugosa x palustris of virginiana; small blooms, light pin; thereof exist selections e.g. 'Spek's Improved' (Spek), with small, semi-double blooms.

 

Book  (1937)  Page(s) 41.  
 
S. L. Wiseman. More Outdoor Rose-Breeding.
'Hollandica', an exceedingly hardy rugosa hybrid which grows upright to seven feet high in Illinois, crosses readily, and its strong hybrids will be reported on next season.

Book  (1936)  Page(s) 634.  
 
R. rugosa hollandica (hybrid rugosa) ? ? ; R. rugosa X R. Manetti; stock for humid and temperate climate and for late oculation.

Book  (1935)  Page(s) 63-64.  
 
Kitchounov, Prof.Dr. Nicolas, Rose Stocks For Northern Russia
...R. rugosa which is used in Holland but the so-called R. rugosa hollandica, a hybrid between R. rugosa and R. Manetti.

Magazine  (1932)  Page(s) 28.  
 
B. so viel umstrittenen, auch in der Rosenzeitung 1925, S. 9–12 und 22 etc. behandelten und nun auch hier dem Liebhaber nicht empfohlenen "Rosa rugosa hollandica“ (RugosaXManetti) ist es uns derzeitige Erfahrung, daß sie wenigstens auf ....

Translation:
...the controversial Rosa rugosa hollandica (Rugosa x Manetti), which was also discussed in the Rosenzeitung 1925, pp. 9-12 and 22, and which is also not recommended to aficionados here, it is our current experience that at least it should be....

Website/Catalog  (1925)  Page(s) 13.  
 
Bastard Rugosa, red, produces large shoots, therefore used very much in Boskoop as understock for standards.

Website/Catalog  (1923)  Page(s) 54.  
 
Rosa Rugosa Boskoopsche-scherpe. Single-bloomed carmine.