Book  (Oct 2001)  Page(s) 230.  Includes photo(s).

Website/Catalog  (1973)  Page(s) 28.  
 
Clematite jackmanii Superba. Floraison prodigieuse, pourpre violet. La plus populaire!

Magazine  (28 Jul 1937)  Page(s) 56.  
 
TWENTY BEST LARGE-FLOWERED HYBRIDS OBTAINABLE IN THIS COUNTRY
Jackmani superba, dark violet-purple, Jackmani Type
All bloom on new wood except Belle of Woking and Sir Garnet Wolseley

Website/Catalog  (1931)  Page(s) 30.  
 
Clematis ... Large blooms, less vigorous climbers, approx. 8 to 15 cm bloom diameter.....Clematis Jackmani superba, well-known dark blue large-bloomed summer vine, July/Aug., 60/80 cm ...2 Marks [10] 18,-- [100] 160,--

Website/Catalog  (1926)  Page(s) 55.  
 
Jackmani superba, violet velouté, extra.

Website/Catalog  (1924)  Page(s) 107.  
 
Jackmani superba. Violet foncé velouté, sépales arrondis.

Website/Catalog  (1919)  Page(s) 67.  
 
Clematis Jackmanni-Hybrids....Jackmanni superba, dark blue... 10 pieces M 35.-, 100 pieces M 300.-

Website/Catalog  (1912)  Page(s) 78.  
 
Summer and Autumn Clematis.
In bloom from July to October.
These flower upon the wood of the current year's growth, and should therefore be pruned to five or six eyes.  The varieties most suitable for bedding are marked thus*.
*Jackmanii Superba, an improved form of the preceding variety, the flowers being larger and deeper in colour...  1s. 6d

Website/Catalog  (1911)  Page(s) 76.  
 
Especially resistant Clematis....Jackmanni superba, dark purple-violet.

Website/Catalog  (1907)  Page(s) 65.  
 
Clematis in pots to plant out in spring and summer.
General Collection.
35 Jackmanii superba (Jackmanii), velvety violet purple.