Book  (Oct 2001)  Page(s) 252.  Includes photo(s).
 
Clematis 'Lady Betty Balfour' George Jackman and Son (England) 1910. C. 'Gipsy Queen' x X. 'Beauty of Worcester'
... named after a patron of the nursery... Produces numerous new shoots annually... single, deep rich blue flowers... best grown in full sun since it flowers late... yellow stamdns...

Book  (1999)  Page(s) 236.  Includes photo(s).
 
...late-flowering clematis...velvety purple flowers...can be pruned hard in early spring...makes it one of the best cultivars for growing among branches of climbing roses...

Website/Catalog  (1963)  Page(s) 53.  
 
Lady Betty Balfour, bleu foncé.

Website/Catalog  (1935)  Page(s) 24.  
 
Lady Betty Balfour.- Violet foncé velouté.

Website/Catalog  (1930)  Page(s) 109.  Includes photo(s).
 
Clematis Lady Betty Balfour (Hybrid) see Page 106

Website/Catalog  (1927)  Page(s) 55.  
 
Clematis Lady Betty Balfour. New! The most magnificent novelty of the last years, extraordinarily vigorous, deep blue with white centre. August-September...6,-

Website/Catalog  (1924)  Page(s) 107.  
 
Lady Betty Balfour (Jackmani). Pourpre velouté foncé; la pièce, 6 fr.