Book  (Apr 1993)  Page(s) 68.  
 
Buttercup Hybrid Tea, apricot-yellow, 1929, Towill.

Book  (1936)  Page(s) 117.  
 
Buttercup (HT) Towill 1927; apricot-yellow to golden-yellow, medium size, semi-double, cup form, fragrance 5/10, floriferous, good strong petals, short stems, growth 5/10. Sangerhausen