Book  (1978)  Page(s) 99.  
 
Sam McGredy. A Hand-Painted Family Tree.
MACmerced was an unsuccessful conventional attempt to raise a red climber. The resulting shrub was kept for its Rosa kordesii background.

p101. Breeding chart which shows the parentage of MACmerced: 'Hamburger Phoenix' x 'Danse du Feu'

Website/Catalog  (1967)  Page(s) 12.  
 
Mercedes (McGredy 1966) what a glorious big, bold rich red is this champion first release from McGredy. It has impressed right from the outset. A colour dazzling with its brightness....