Cunningham's Encyclopedia of Magical Herbs - Scott Cunningham 1985
Bistort
The Herbs

(Polygonum bistorta)
Folk names: Dragonwort, Easter Giant, English Serpentary, Osterick, Passions, Patience Dock, Red Legs, Snakeweed, Sweet Dock
Gender: Feminine
Planet: Saturn
Element: Earth
Powers: Psychic Powers, Fertility
Magical Uses: Carry bistort if you wish to conceive. Burn with frankincense to improve psychic powers, or when using divination.
The infusion sprinkled about a place will drive out poltergeists.
Bistort is carried in money-attracting sachets and is added to wealth and money incenses.