N.O. Urticaceae. Tincture of fresh plant.
Belongs to the nettles.
It grows on old walls, and its ashes contain much Nitre (Kali-nit.).
Cooper has used it with success in a case of renal calculus, and in one case it produced nightmare, the patient dreaming of being buried alive in the midst of ruins.
Compare: Urt. urens, Kali-nit.