(Columbo.)

Origin. - The dried root of Jateorhiza palmata (Lam.) Miers., a plant native to the forests of Eastern Africa and Madagascar, and cultivated in the East Indies.

Description and Properties. - Nearly circular disks, I to 2 inches (25-50 Mm.) in diameter and 1/4 to 1/2 inch (6-12 Mm.) thick. Externally greenish-brown and wrinkled; internally yellowish or grayish-yellow; depressed in the center, with a few interrupted circles of projecting wood-bundles; distinctly radiate in the outer portion; fracture short, mealy; odor slight; taste mucilaginous, slightly aromatic, very bitter. It contains a bitter crystalline principle (calumbin, calumbic acid, berberine) and starch. No tannin is present.

Dose. - 10-60 grains (0.6-4.0 Gm.) [30 grains (2 Gm.), U. S. P.

Official Preparations

Fluidextractum Calumbae - Fluidextracti Calumbae - Fluidextract of Ca-lumba. - Dose, 10-60 minims (0.6-4.0 Cc.) [30 minims (2 Cc), U. S. P.].

Tinctura Calumbae - Tincturae Calumbae - Tincture of Calumba (20 per cent.). - Dose, 1-4 fluidrams (4.0-15.0 Cc.) [1 fluidram (4 Cc), U. S. P.].