Book  (1936)  Page(s) 668.  
 
Sistau, Primerose (polyantha) Turbat 1925; cochenille-carmine, shaded yellow, medium size, double, flat cup form, lasting, in clusters of 5-6, floriferous, continuous bloom, few prickles, growth 6/10, short. Sangerhausen

Article (misc)  (Feb 1927)  Page(s) 223.  
 
Primerose Sistau Dwarf Polyantha. (E. Turbat & Co., 1925.) Description... cochineal-carmine, shaded yellow when open...