Book  (1928)  Page(s) 57.  
 
A List of Fifty of the Best Inexpensive Varieties
Red Varieties
Prince of Darkness (Brand).  7.5.  This is a rich, dark maroon peony, of typical semi-rose type.  It is a free bloomer.  Its blossoms open early and last long.  It is excellent for landscape effect and for cutting.  It is a question as to which is the better peony, Midnight or Prince of Darkness.  Both varieties should be in every large collection.