Herb Pharm® Goldenseal Liquid Herbal Extract. Hydrastis canadensis. Cultivated rhizome & rootlets. Herbal supplement. Dry herb/menstruum ratio: 1:5. We prepare our goldenseal extract from the rhizome & rootlets of hydrastis canadensis plants which are certified organically grown. To assure optimal extraction of goldenseal's bioactive compounds, the rhizome & rootlets are hand-dug in the autumn, are carefully cleaned & shade-dried, and are then thoroughly extracted. Goldenseal liquid extract. 800-348-4372. www.herb-pharm.com.