Book  (Oct 2001)  Page(s) 188-189.  Includes photo(s).
 
Clematis 'Fireworks'
John Treasure (England) c. 1980.
C. 'Maureen' x C. 'Nelly Moser'
... single, large, bluish purple flowers, six to eight tepals, each with a conspicuous twist, gently notched margins, and a bright cerise central bar. The reverse of each tepal boasts a greenish bar and mauve margins. The tepal tips tend to recurve slightly.