Book  (1967)  Page(s) 97.  Includes photo(s).
 
p96 (near). Photo. 'Blue Moon' x 'Blue Diamond'.

John W. Simpson. My New Introductions from Overseas. 'Blue Diamond' Hybrid tea. Very vigorous. It had large trusses of high pointed lavender double blooms. I have crossed same with 'Blue Moon' and have one or two promising mauve seedlings.