Book  (Oct 2001)  Page(s) 112.  Includes photo(s).
 
Clematis 'Anders'
Atragene Group
(C. macropetala 'Anders')
Magnus Johnson (Sweden) 1980
Selected form of C. macropetala
... nodding, laver blue, semi-double flowers... four narrow, pointed tepals, each 4.5 cm (1.5-2 in.) long, enclosing a further set of long petal-like staminoides... Flowers borne primarily on old wood, although a few are borne on new growth... Some blooms in late summer...