https://www.rhs.org.uk/plants/271991/hepatica-nobilis-var-japonica-kousei-(9-d)/details
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hepatica nobilisvarjaponicakouseirhs
https://www.rhs.org.uk/plants/278420/hepatica-nobilis-var-japonica-koshinoharu/details
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hepatica nobilisvarjaponicarhs
https://www.rhs.org.uk/plants/255010/hepatica-nobilis-var-japonica-f-magna-dark-blue-flowered-(d)/details
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hepatica nobilisdark bluevarjaponicaf