The traditional Lithuanian midsummer flower associated with the search for love is the fern blossom.
In Rasos folklore, the fern blossom is a mythical flower said to bloom for only a moment during the midsummer night. Young people traditionally ventured into the forest to search for it, and finding it was believed to bring knowledge, happiness, or romantic fortune. The story is symbolic rather than botanical: true ferns reproduce by spores and do not produce flowers.
The legend belongs to a wider northern and eastern European pattern of midsummer stories about supernatural plants, hidden treasure, and unusual events occurring during the shortest night. In Lithuania, the search for the blossom is often presented as a romantic adventure.
The belief is sometimes connected with the Lithuanian festival’s older name, Rasos, rather than with a particular species of flowering plant. That distinction helps separate the folklore motif from real midsummer flowers used in wreaths.