(Dec 2014)  Page(s) 218.  
 
Clematis 'Advent Bells' Clematis of the Month for December 2014
In 2004 I had the idea of crossing two related species, although their distribution was continents apart. C. cirrhosa of the Mediterranean Regions and C. napaulensis of Eastern Asia seemed as it might be a possibility, so I set about cross pollination with both C. cirrhosa 'Freckles' and C. napaulensis being tried as the mother plant, but only C. napaulensis produced seed, which were ready for sowing in late spring of 2005.....

(Jun 2004)  Includes photo(s).
 
[From website]
We know that the original C. 'Candida' was introduced in 1862 by Victor Lemoine, who reported its parentage as C. lanuginosa × C. patens. But the plant as originally described has some arguable differences from the one we know today, and it is not quite clear that it still survives. The North American version of 'Candida' has little to nothing of the grayish to lavender shading ascribed to the young flower nor the dark stamens at the center, though it has some claim to the brilliant white (L. candidus: glossy or pure white) of the original.
What is intriguing is that the flower of our current 'Candida' seems virtually identical to that of another cultivar more prominent in the international trade: 'Marie Boisselot.' As we might expect, the formal descriptions of those two varieties do not match up in every particular, and as yet there has been no rigorous attempt to analyse them side by side, independently of labels. The possible connection raises some interesting historical questions. How did 'Candida' lose out in Europe and England? How did the North American trade get its 'Candida,' years before it ever imported 'Marie Boisselot'? And so on. For years students of clematis have been trying to penetrate the confusion of IDs that has hovered over several of the most prominent whites: over 'Marie Boisselot,' 'Mevrouw Le Coultre,' and 'Madame Van Houtte,' as well as 'Candida.' Most of the identities seem now to have been worked out, but there is still the hazard of mistaken labels.