Cunningham's Encyclopedia of Magical Herbs - Scott Cunningham 1985
Citron
The Herbs
(Citnus medica) G
Folk Names: Sukake, Forbidden Fruit, Rough Lemon
Gender: Masculine
Planet: Sun
Element: Air
Powers: Psychic Powers, Healing
Magical Uses: If eaten, the citron increases psychic powers.
It is also used in healing spells and incenses.