 One of the founders of American pharmacognosy, John Uri Lloyd, writing in his famous "Pharmacopeia", also cited references to the use of "D. staphisagria" preparations in the writings of Nicander and Crescenzio.Additionally, stavesacre is mentioned in a fourth century "magical" papyrus codex from Egypt where it possibly facilitated gaining an erection.The plant is to be crushed and mixed with water and then sprinkled around the house.