Menispermum canadense

It is also known as moonseed. It is a woody evergreen vine, with a long, cylindrical, yellow root. The stem is slender 2-4m long. The leaves are alternate, palmate, peltate, cordate, roundish, three to seven angled. The small greenish-yellow or white flowers appear in June and July in axillary panicles.
It is native to Canada and United States of America. It is Cultivated in Britain as a hardy, deciduous, ornamental shrub. A closely allied species is indigenous to the temperate parts of Eastern Asia.
It is covered by German Homoeopathic Pharmacopoeia as well as Homoeopathic Pharmacopoeia of United States. Its root is used to prepare mother tincture.
It is reported to be useful in skin disorders, rheumatism and cervical cancer. It is used in backache, headache, spinal pain and swelling of tongue. According to a report in small doses it has good action on pulmonary and hepatic affection. Pressure in head from within outward, with stretching and yawning. Head pain extending to down back.Tongue swollen and much saliva. It is useful in megrim, associated with restlessness and dreams.
Recommended dose: Q/1x and higher.

References:
1. P. N. Varma, InduVaid, Encyclopaedia of Homoeopathic Pharmacopoeia, Updated edition 2007, B. Jain Publishers, New Delhi
2. A. L. Blackwood, A Manual of Materia Medica, Therapeutics and Pharmacology, Reprint Edition 1995, B. Jain Publishers, New Delhi
3. W. Boericke, New Manual of Homoeopathic Materia Medica& Repertory [with Relationship of Remedies], Second Re-Augmented & Revised Edition Based on Ninth Edition, Reprint Edition 2002, B. Jain Publishers, New Delhi
4. The Physiomedical Dispensatory, 1869, was written by William Cook, M.D. It was scanned by Paul Bergner at http://medherb.com Source: http://www.henriettes-herb.com/eclectic/cook/MENISPERMUM_CANADENSE.htm