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'C. 'Evirida'' clematis Description
'Pistachio' clematis photo
Photo courtesy of Sue Taylor
Availability:
Commercially available
HMF Ratings:
15 favorite votes.  
Origin:
Discovered by Raymond J. Evison (United Kingdom, 1993).
Introduced in United Kingdom by Guernsey Clematis Nursery in 1999 as 'Pistachio'.
Class:
Early Small Flowered, Group 3, Late Large Flowered.  
Bloom:
White, purple anthers.  6 petals.  Average diameter 6".  Very large, single bloom form.  Early summer to early autumn.  
Habit:

Height: 8' to 10' (245 to 305cm).  
Growing:
USDA zone 8a through 9b.  Needs a warm, frost-free situation.  This plant blooms twice.  It blooms on the previous year's growth, so resist the urge to prune it in early spring.  However, if you garden in a place with cold winters, Mother Nature will more than likely prune the plant for you.  It will bloom a second time on new growth.  
Patents:
Canada - Patent No: 2277  on  23 Nov 2005
Application No: 01-2748  on  25 May 2001
Rights surrendered on November 23, 2016.
Denomination: 'Evirida'
Trade name: Pistachio
Breeder: Mogens N. Olesen, Poulsen Roser A/S, Fredensborg, Denmark; Raymond J. Evison, Raymond J. Evison, Ltd., Channel Islands, United Kingdom
'Evirida' originated as the result of a mutation of the Clematis florida variety 'Alba Plena' discovered in the Guernsey Clematis Nursery in the Channel Islands, United Kingdom in 1993.
 
United States - Patent No: PP 15,093  on  24 Aug 2004   VIEW USPTO PATENT
Application No: 09/863,123  on  22 May 2001
Ploidy:
Diploid
Notes:
Patent application states the 'Evirida' is a sport of C. florida.