Goldenseal (Orange-root, Orangeroot; Hydrastis canadensis) is a in the family , native to southeastern and the northeastern . It may be distinguished by its thick, yellow knotted . The stem is purplish and hairy above ground and yellow below ground where it connects to the yellow rhizome. The plant bears 2 palmate, hairy leaves with 5-7 double-toothed lobes and single, small, inconspicuous flowers with greenish white stamens in the late spring. It bears a single berry like a large raspberry with 10-30 seeds in the summer.
Herbal properties (whole herb): bitter, , alterative, anticatarrhal, , , , , and .
Goldenseal is often used as a multi-purpose remedy, having many different medicinal properties. In addition to working as a topical , it can also be taken internally as a aid, and can remove canker sores when gargled. Goldenseal may be purchased in , , form, or as a bulk powder. Goldenseal is often used to boost the medicinal effects of other herbs it is blended or formulated with.
A second species from , previously listed as Hydrastis palmatum, is sufficiently distinct that it is now usually treated in a separate , as .