Viticella type. 'Impy' is a recent introduction by Magnus Johnson from Sweden. It has purple tepals with a pale centre. This variety is listed in John Howells's book Trouble-free clematis: the viticellas but with incomplete information.

Group: Viticella group
Aspect: Sun or semi-shade
Pruning: Hard prune (Group 3)
Raised by: Magnus Johnson
Country of origin: Sweden
Other name(s): None known

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Magnus Johnson