Book  (Oct 2001)  Page(s) 176-177.  Includes photo(s).
 
Clematis 'Emilia Plater'
Brother Stefan Franczak (Poland) 1989
Parentage unknown
... named after a Polish heroine... single, small, violet-blue flowers... four broad, rather rounded tepals, which are semi-nodding at first but open and slightly recruve as they mature... darker violet-veined central bar...