Night Of Ivan Kupala. Belarus, Russia, Ukraine

It is to be noted that biologists have held the persistent scientific fact that ferns have never and will never bloom.
In Gogol's story The Eve of Ivan Kupala a young man finds the fabulous fern-flower but is cursed by it. Gogol's witches' sabbath on the Eve of Ivan Kupala inspired Modest Mussorgsky to compose his Night on Bald Mountain.