Book  (Oct 2001)  Page(s) 138.  Includes photo(s).
 
Clematis 'Brunette'
Atragene Group
(C. 'Catullus')
Magnus Johnson (Sweden) 1979
C. koreana var. lutea x C. fauriei
... small, nodding, bell-shaped, plum-purple flowers... four spear-shaped textured tepals...