Picture and description of Clematis 'Barbara Jackman'
Amazon.com : Barbara Jackman Clematis Vine - Live Plant in a 4 Inch Growers Pot - Clematis 'Barbara Jackman' - Starter Plants Ready for The Garden - Bold and Beautiful Purple Flowering
Clematis 'Barbara Jackman' - Degroot
Clématite 'Barbara Jackman' - Jardiland
Clematis 'Barbara Jackman' in the Clematis Database - Garden.org