Book  (Oct 2001)  Page(s) 104.  Includes photo(s).
 
Clematis 'Alba'
Herbaceous/Integrifolia Group
(C. integrifolia 'Alba')
Stanley J. Zubrowski (Canada) 1985
Selected form of C. integrifolia
... The single, nodding, bell-shaped, scented flowers are composed of four white, sometimes tinged with blue, narrow, pointed tepals...

Book  (11 Oct 2000)  Page(s) 11.  
 
C. integrifolia 'Alba'
has a delightful, strong scent...