Website/Catalog  (1867)  Page(s) 21.  
 
Clematis patens purpurascens Sieb. - Pétales pourpres, étamines brunes ....2 Francs

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.
....7. Var. The stamens are dark brown. The petals are pale in color in the center, slightly darker lilac at the edges. The entire flower is somewhat paler than the rest. The petals have a green stripe in the center on the back. Dimensions as with no. 3. From 3-7 are varieties from seeds.