Diktamnon (Gr.), or Dictemnus (Dittany). A curious plant possessing very occult and mystical properties and well-known from ancient times. It was sacred to the Moon-Goddesses. Luna, Astarte, Diana. The Cretan name of Diana was Diktynna, and as such the goddess wore a wreath made of this magic plant. The Dihtamnon is an evergreen shrub whose contact, as claimed in Occultism, develops and at the same time cures somnambulism. Mixed with Verbena it will produce clairvoyance and ecstasy. Pharmacy attributes to the Dihtamnon strongly sedative and quieting properties. It grows in abundance on Mount Dicte, in Crete, and enters into many magical performances resorted to by the Cretans even to this day.
Source: H.P.Blavatsky - The Theosophical Glossary