Book  (1880)  Page(s) 89.  
 
C. Prince Alfred of Edinburgh, Jackman. — Eine gefällige Varietät der Patens-Gruppe.  Blätter dreizählig, Blattchen oval, das oberste bisweilen dreispaltig.  Die blumen sind 16 cm. im Durchmesser, 8 sepalig; die Sepalen sind länglich-oval zugespitzt, zart malvenfarbig, mit blasserer Naht, die zuletzt weiss wird.  Staubfäden weiss, Staubbeutel purpurlich-kastanienbraun.  Diese reichblühende und schöne Varietät wurde auf einer Ausstellung in Regent's Park von Ihrer Königlichen Hoheit der Herzogin von Edinburg nach ihrem Sohne benannt.  Mai und Juni.

Translation:  C. Prince Alfred of Edinburgh, Jackman. — An attractive variety of the Patens group.  Leaves have three oval leaflets, the uppermost sometimes with three lobes. The flowers have 8 sepals, and are 16 cm. in diameter; the sepals are oval- elongate, delicately mauve, with a pale bar, which ages to white.  The stamens are white, and the anthers are purple-maroon. At an exhibition at Regent's Park, this free-blooming and beautiful variety was chosen by Her Royal Highness the Duchess of Edinburgh to be named for her son.  Blooms in May and June.

Magazine  (1877)  Page(s) 270.  
 
Clematis Prince Alfred of Edimburgh (Jackman),  s. des patens; mauve.

Magazine  (Jun 1875)  Page(s) 142.  
 
GARDEN GOSSIP.
Of the exhibition of Clematis, which has been kept up by Messrs. G. Jackman and Son, of Woking, during the greater portion of the past month, in the garden of the Royal Botanic Society, there can be but one opinion- it has been altogether novel in character, and it has been of surpassing excellence. [...]
Amongst the newer varieties of the patens type the following were conspicuous:
Prince Alfred of Edinburgh, a delicate mauve, with paler, almost white bar...

Magazine  (29 May 1875)  Page(s) 684.  
 
MESSRS. JACKMAN'S CLEMATISES.
Messrs. Jackman & Son's popular exhibition at Regent's Park has now been brought to a close, and we may fittingly call attention at its termination to some of the charming novelties which it has been the means of introducing to our notice.  Amongst the later novelties of the patens group were... Prince Alfred of Edinburgh, a very attractive variety, selected by the Duchess of Edinburgh; it had delicate mauve flowers, with a paler bar becoming white, and was very free-blooming and showy.