Circaea x intermedia Ehrh. (Klein heksenkruid) een tuinplant?

Circaea x intermedia, a very rare taxon in the Netherlands, was found on a new locality on the edge of a woodland near the outskirts of the town of Ede. Growing conditions on the site are not suitable for both parental species ( C. alpina and C. lutetiana). Therefore it is most unlikely the hybrid was formed here in situ. It is concluded that the presence of C. x intermedia probably originates from dumping of gardenwaste or soil with fragments of rhizomes. Plants named C. alpina are grown in nurseries. Up to now C. x intermedia is not known as a garden plant. Maybe both taxa are mixed up and “easy to grow” Circaea x intermedia is sold as C. alpina.