Article (website)  (2005)  Page(s) 5.  
 
The 'Bleu Rougâtre de Flottbeck', described by Bosse as "bright red with violet fluorescence" is probably the only cultivar James Booth ever bred.

Flottbeck, or as it is written today, 'Flottbek', now a suburb of Hamburg/Germany...

Book  (1936)  Page(s) 268.  
 
Flottbeck, Bleu rouge de (Centifolia); bright pink, shaded violet, medium-size, 3/4-full

Book  (1899)  Page(s) 26.  
 
Bleu rougeâtre de Flottbeck, Centifolia, rose ombré violet

Book  (1880)  Page(s) 21.  
 
centifolia, Bleu rougeâtre de Flottbeck, bright pink, violet reflexes

Book  (1858)  Page(s) 141.  
 
Rosa centifolia ....  Bleu rougeâtre de Flottbeck, bright rosy pink, violet reflexes.

Book  (1849)  Page(s) 577.  
 
R. centifolia L. ...Double varieties and hybrids: ...bleu rougeâtre de Flottbeck, bright red, shimmering violet