Book  (1936)  Page(s) 560.  
 
Pfitzer, Clothilde (polyantha) Soup. & Nott. 1899; Boule de Neige X Mignonette; pure white, medium size, double, flat, in clusters of 10-20, fragrance 5/10, floriferous, continuous bloom, growth 6/10, short.

Book  (1902)  Page(s) 62.  
 
(Soupert 1899) Blanc pur.

Book  (1899)  Page(s) 182.  
 
Clothilde Pfitzer, polyantha, Soupert, 1899, blanc pur