Book  (2001)  Page(s) 761.  
 
C. lanuginosa 'Longipetala'  Lan. 
( Said to be a form of C. lanuginosa collected by Robert Fortune . ( The information that it should be a Japanese cultivar is probably erroneous . ) Boom en Plantenbeurs 20 , 1890 ; Spingarn 84 , 1935 . Flowers violet with reddish central bar . The cultivar ... similar to those of C. lanuginosa ' Pallida ' , but with long tepals 

Magazine  (1877)  Page(s) 269.  
 
Clematis longipetala (A. Leroy).