Many occult beliefs have adhered to the common fern. In
ancient times the fern was thought not to have seed. Later on,
people thought that the seed was invisible, and if a man could
find this invisible seed, it would confer the power of invisibility
upon him. The fern was also believed to flower at midnight on
St. John’s Eve, one of the more magical days of the year in medieval
Europe. Legend said that anyone who gained possession
of the flower would be protected from all evil influences and
would obtain a revelation of hidden treasure.