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'Cassis' clematis Description
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'Cassis' clematis photo
Photo courtesy of Sue_Z
Availability:
Commercially available
Synonyms:
• Evipo020
HMF Ratings:
5 favorite votes.  
Origin:
Bred by Mogens Nyegaard Olesen (Denmark, 1996). Bred by Raymond J. Evison (United Kingdom, 1996).
Introduced in Denmark by Poulsen Roser A/S in 2003 as 'Cassis'.
Introduced in United Kingdom by Guernsey Clematis Nursery in 2003.
Class:
Group 3, Large-flowered.  
Bloom:
Mauve.  Sometimes striped.  6 petals.  Average diameter 4.25".  Medium, single bloom form.  Early to midsummer.  
Habit:

Height: 6'7" to 9'10" (200 to 300cm).  
Growing:
USDA zone 8b and warmer.  
Patents:
Canada - Patent No: 3890  on  28 Jun 2010
Application No: 04-4267  on  23 Jun 2004
Rights surrendered on June 22, 2016.
Denomination: 'Evipo020'
Trade name: Cassis
Breeder: Mogens N. Olesen, Poulsen Roser A/S, Fredensborg, Denmark; Raymond J. Evison, Raymond J. Evison, Ltd., Channel Islands, United Kingdom
'Evipo020' originated from a cross made in the spring of 1996 between the Clematis viticella variety 'Vinesa Violacea' and an unnamed seedling
 
United States - Patent No: PP 16,012  on  27 Sep 2005   VIEW USPTO PATENT
Application No: 10/817,362  on  4 Jan 2004
Inventors: Olesen; Mogens N. (Fredensborg, DK), Evison; Raymond J. (St. Sampsons, GB)
Assignee: Poulsen Roser A/S (Fredensborg, DK)
The present invention constitutes a new and distinct variety of Clematis which originated from a controlled crossing between the female seed parent, Clematis viticella `Venosa Violacea`, a non-patented variety, and the male parent, an un-named seedling.....`Evipo020` was selected by Raymond J. Evison and Mogens N. Olesen in their Clematis development program in Guernsey, Channel Islands, in July 2000.
Parentage:
seedling of Venosa Violacea
Notes: