136. COPTIS, N.F.—GOLD THREAD. The herb of Cop'tis trifol'ia Salisbury. Habitat: Northern and Eastern United States. The drug as found in commerce consists mainly of long, thread-like, yellow rootlets, attached to a slender, terete rhizome, mixed with trifoliate leaves. Contains berberine and a white alkaloid resembling hydrastine. Tonic. Dose: 15 to 60 gr. (1 to 4 Gm.) in decoction.
A Manual of Organic Materia Medica and Pharmacognosy, 1917, was written by Lucius E. Sayre, B.S. Ph. M.