It's enormous, for a Fumariaceae (if that's what it is).
[image:15166] Pic: Flowering plant.
[image:15165] Pic: Flowerspike.
It's almost 1 m (4') tall, and was unlabelled in the botanical garden of Gothenburg. These photos were taken in June.
Any of you have a clue? Thanks!
Update: It's a Corydalis caseana. Thanks Jimmy!