Book  (Oct 2001)  Page(s) 260.  Includes photo(s).
 
Clematis 'Lawsoniana'
Isaac Anderson-Henry (Scotland) 1870
C. lanuginosa x C. 'Fortunei'
... single, mauvish blue flowers... six to eight overlapping and tapering tepals... white filaments and beige anthers...

Book  (Apr 1998)  Page(s) 128.  

Website / Catalog  (1935)  Page(s) 24.  
 
Lawsoniana.- Mauve lilacé.

Website / Catalog  (1932)  Page(s) 24.  
 
Clématites à grandes fleurs....Lawsoniana. Mauve lilacé.