Also Known As: Goldenseal, Orange-root, Orangeroot, Hydrastis canadensis

Goldenseal (Orange-root, Orangeroot; Hydrastis canadensis) is a perennial herb in the buttercup family Ranunculaceae, native to southeastern Canada and the northeastern United States. It may be distinguished by its thick, yellow knotted rootstock. The stem is purplish and hairy above ground and yellow below ground where it connects to the yellow rhizome. The plant bears two 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.

Goldenseal has been ascribed the following herbal properties (whole herb): bitter, hepatic, alterative, anticatarrhal, anti-inflammatory, antimicrobial, laxative, emmenagogue, and oxytocic.

Goldenseal is often used as a multi-purpose remedy, and is thought to possess many different medicinal properties. In addition to being used as a topical antimicrobial, it is also taken internally as a digestion aid, and may remove canker sores when gargled. Goldenseal may be purchased in salve, tablet, tincture 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 Japan, previously listed as Hydrastis palmatum, is sufficiently distinct that it is now usually treated in a separate genus, as Glaucidium palmatum.

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