This section is from the book "A Treatise On Therapeutics, And Pharmacology Or Materia Medica Vol1", by George B. Wood. Also available from Amazon: Part 1 and Part 2.
By this name is designated, in the secondary list of the U. S. Pharmacopoeia, the root of Xanthorrhiza apiifolia, an indigenous shrub, growing in the interior of the Southern, and in the Western States. Though the bark of the stem, as well as the root, is bitter, the latter only is officinal. This is cylindrical, from three inches to a foot long, about half an inch thick, yellow, inodorous, and extremely bitter, without astringency. It imparts its colour, bitterness, and medical virtues to water; and the infusion is not affected by the salts of iron. It may be employed in the same affections, in the same manner, and in the same dose as quassia.