Book  (Oct 2001)  Page(s) 367.  Includes photo(s).

Book  (11 Oct 2000)  Page(s) 9.  Includes photo(s).
 
Clematis 'The President'
Early large-flowered cultivar
Group Two

Book  (1999)  Page(s) 238.  
 
...deep purple flowers with a silvery reverse to each petal

Book  (1999)  Page(s) 131.  
 
Clematis 'The President', cv., 1985

Book  (31 Oct 1993)  Page(s) 106.  Includes photo(s).

Website / Catalog  (1932)  Page(s) 24.  
 
Clématites à grandes fleurs....The President. Bleu foncé.