Clematis viticella group (Cultivated)



 
Ranunculaceae week : Clematis from my garden in Ritterhude: Clematis Garden cultivar "President" from my garden in Ritterhude.
Fotos taken on 2.7.2010

I hope Clematis viticella

 

From California

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Clematis viticella L., Sp. Pl. 543 1753.
syn: Anemone viticella K.Krause; Clematis baccata Gross
A woody climber with large beautiful blue flowers often grown on supports, walls or fences 
Photographed from Hazuribagh Garden in Srinagar, Kashmir in June 2010 
Also photographed from SFO Botanical Garden in California in July 2008

This most popular cultivated species has number of cultivars like 'Alba', 'Purpurea', 'Violacea', 'Caerulea', 'Rubra', 'Kermesina', and what not. You may pick your colour.   
I think plant from Kashmir may be Clematis 'Jackmanii'  as per images, details and references herein. 
I hope you are right ..., Looking at the confusion on various websites, I think it would be right to name it as C. x jackmanii (both GRIN and Kew database), TPL and Plants of the World Online list C. jackmanii, but even those websites which name it Clematis 'Jackmanii' (as you have suggested) accept it to be be interspecific hybrid.
See pictures in this original book by  Jackman himself


Clematis viticella L., Sp. Pl. 543 1753.
photographed from SFO Botanical Garden in California in July 2008
 
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SK931 05 JAN-2018 : 5 posts by 3 authors. Attachments (1)
Location: Kathmandu, Nepal 
Date: 29 March 2014
Altitude: 4400 ft.
From a flower show !

Some cultivar of Clematis viticella

 

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