Book  (Jan 2000)  Page(s) 71.  
 
Chocolate Soldier Herbaceous Peony (Auten 1939). A unique hybrid, the result of a cross between Paeonia lactiflora and P. officinalis. While usually of Japanese form, the same bush may produce both single and double flowers as well. Some of the large blooms are solid dark red, others may be flushed with yellow...