This section is from the book "Materia Medica And Therapeutics: An Introduction to the National Treatment of Disease", by John Mitchell Bruce. Also available from Amazon: The pharmacology and therapeutics of the materia medica.
The rhizome and rootlets of Spigelia mari-landica. From the United States.
Characters.-A thick globular brown head, with numerous fine branching rootlets.
Composition.-Spigelia contains an uncrystallisable bitter principle, a volatile oil, tannin, etc.
Dose.-60 to 120 gr.
Non-officinal Preparation. A Fluid Extract. Dose, 1 to 4 fl.dr.
Spigelia is an anthelmintic, and is directed against the round worm. It is moderately purgative, but should be assisted by senna or other cathartic.