Columbo, jateorhiza palmata. Official in all nations except Serbia.

Calumba is a valuable tannin-free bitter containing berberine, as well as its own essential bitter, columbin.

For a discussion of the bitters, see "Gentian," and for the berberine-bearing bitters see "Berberis" and "Hydrastis." The therapeutics need not be repeated here. Dose: fl. 10 to 30 minims.