Book  (Oct 2001)  Page(s) 111-112.  Includes photo(s).
 
Clematis 'Ametistina'
Atragene Group
Magnus Johnson (Sweden) 1975
C. fauriei x C. sibirica (F2 Hybrid)
... mauvish pink flowers... four tepals, each 4-6 cm (1.5.-2.25 in.) long... pale pink, spatula-shaped, petal-like staminoides... occasional flowers in late summer... best in sun to get summer flowers...