Magazine  (Jun 1948)  Page(s) 11.  
 
"A List of Mr. Kelsey's Originations" By W. F. Christman
Single Peonies
Pink Bonnet (Kelsey 1935). Seedling K-5. Single, clear light pink. One of the first to bloom of the sinensis varieties. Petals are mostly cupped and shaped like a tulip.