This section is from the book "Materia Medica Pharmacy, Pharmacology And Therapeutics", by W. Hale White. Also available from Amazon: Materia Medica Pharmacy, Pharmacology And Therapeutics..
The rhizome and roots of Menispermum canadense Linne (nat. ord. Menispermaceae).
North America, in moist thickets.
Rhizome several feet long, about 5 mm. thick, brown or yellowish-brown, somewhat knotty, finely wrinkled, longitudinally and beset with numerous thin, rather brittle roots; fracture tough, woody; internally yellowish, the bark rather thick, the wood rays broad, porous, and longest on the lower side; pith distinct; nearly inodorous; taste bitter.
Dose, 5 to 30 gr.; .30 to 2.00 gm.
Dose, 5 to 30 m.; .30 to 2.00 c.c.