Website/Catalog  (29 Jul 2010)  Includes photo(s).
 
 Clematis viticella rubra is probably the red-flowered form mentioned in Curtis’s Botanical Magazine [BM t.565/1802].  ‘Rubra grandiflora’, with large, carmine flowers, is still commonly grown [Hortus].  This form was figured in Flore des Serres [FS p.20/1874] and is used as illustration here.
Clematis viticella L. var. rubra grandiflora | FS p.20/1874 | BHL.  Two clematis are illustrated,  hybrid with large blue flowers and viticella rubra grandiflora with red flowers

Website/Catalog  (1926)  Page(s) 55.  
 
Viticella rubra grandiflora rouge cramoisi.

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* 
*Viticella Rubra Grandiflora, light claret, very free flowering...  1s. 6d.

Website/Catalog  (1907)  Page(s) 66.  
 
Clematis in pots to plant out in spring and summer.
General Collection.
116 viticella rubra-grandiflora, claret red.

Book  (1906)  Page(s) 53.  
 
Principal garden varieties of Clematis:
Viticella type. 
Viticella rubra grandiflora (July to September)... Claret-red.

Magazine  (24 Nov 1900)  Page(s) 90.  
 
Die Firma Simon Louis frères, Plantières bei Metz, hatte Neuheiten und seltene Sorten ausgestellt, die für unsere Landschaftsgärtner von hoher Wichtigkeit sein werden, so Clematis Viticella fl. pl. Lamartine, völlig gefüllt blühend,  Viticella rubra grandiflora, Viticella kermesina und die riesenblumigen Sorten „Princesse of Wales" „Paul Avenel" , "William Kennet'', „Max Leichtlin" u. a.

Translation:
The company Simon Louis frères, Plantières near Metz, had exhibited novelties and rare varieties, which will be of great importance to our landscape gardeners, such as Clematis Viticella fl. pl. Lamartine, completely double flowering, Viticella rubra grandiflora, Viticella kermesina and the giant-flowered varieties “Princesse of Wales”, “Paul Avenel”, “William Kennet”, “Max Leichtlin” and others.

Book  (1898)  Page(s) 72.  
 
Variétés Horticoles
IIIe Groupe.— VITICELLA.
Rubra grandiflora (Jackman).  Fleur rouge cramoisi brillant.

Magazine  (1877)  Page(s) 261, 272.  
 
p. 261: CI. Vitic. rubra grandifl. — Flore des Serres, 1874, XX, pl. 1783-1779.

p. 272: Clematis Viticella grandiflora; rose.
Clematis Viticella rubra grandiflora (Jackman), Flore XX, 19; pourpre.

Magazine  (1874)  Page(s) 24, pl. 1783.  Includes photo(s).
 
1783. C. Viticella rubra grandiflora (Jackman). L'une des plus jolies variétés du groupe des Viticella. Certificat de première classe à South Kensington (Londres). Fleurs abondantes, formées de quatre à six pétales lie de vin.

Magazine  (1873)  Page(s) 20-21.  
 
German translation of text from The Florist and Pomologist, November 1872, p. 165