Plant Family


Family CN: Golden-seal Family
Family Code: HYDRAS
Family Authority: Martinov 1820
Summary: A family of 2 genera and 2 species, perennial herbs, of temperate e. North America and Japan. In chemistry, morphology, and anatomy, Hydrastis shows some relationship to Podophyllum and Diphylleia of the Podophyllaceae (often included in the Berberidaceae). Though usually placed in the Ranunculaceae, Tobe & Keating (1985) present evidence from morphology, anatomy, embryology, palynology, chemistry, and cytology that suggests that Hydrastis is best recognized as a monotypic family. They contend that "Hydrastis represents a relictual primitive group which very early diverged from a common ancestral stock of the Ranunculaceae, Berberidaceae and probably of Circaeasteraceae, and that Hydrastis has evolved in its own evolutionary line parallel with other lines leading to the modern representatives of these families." Thorne (1992) and Reveal (1993a) have also accepted Hydrastidaceae as a distinct family. Tobe in Kubitzki & Bayer places Hydrastis with Glaucidium Siebold & Zuccarini in a bigeneric Hydrastidaceae.
Reference: Tamura in Kubitzki, Rohwer, & Bittrich (1993); Wang et al. (2009); Tobe in Kubitzki & Bayer (2002).
Last Updated: 2016-02-18
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