Website/Catalog  (1867)  Page(s) 21.  
 
Clematis patens rosea Sieb. - Pétales roses, étamines brunes 

Magazine  (1855)  Page(s) 190.  
 
ON SOME VARIETIES OF CLEMATIS FLORIDA AZUREA, SIEB.
IMPORTED INTO THE NETHERLANDS AND OBTAINED BY CULTURE, BY Squire VON SIEBOLD.
.... 4. Var. The stamens are brownish in color, the petals in the center with a yellow stripe, pale on the sides and pink towards the edge. Length 0.05. Width 0.02.