staphisagria

-- All kinds of lice and their nits may be got rid of by washing with a simple decoction of stavesacre (_Delphinium staphisagria_), or with a lotion made with the bruised seed in vinegar, or with the tincture, or by rubbing in a salve made with the seeds and four times their weight of lard very carefully beaten together.

Burroughs' Encyclopaedia of Astounding Facts and Useful Information, 1889 Barkham Burroughs

When attention to the wearing apparel is not immediately practicable, ointments of sulphur and staphisagria, and lotions of carbolic acid, may be advised as temporary measures.

Essentials of Diseases of the Skin Including the Syphilodermata Arranged in the Form of Questions and Answers Prepared Especially for Students of Medicine Henry Weightman Stelwagon 1886