Hydrastis canadensis , or Hydraste of Canada , is an antiquated species of plants dicotylédones of North America of the family of the Ranunculaceae .

The flowers and the sheets are final. It is a long-lived species by a rhizome (underground stem). The flowers are trimères: the Sépale S are white null and void, helical cheesecloths. Its fruit is fleshy contrary to the others Ranunculaceae .

It is used in pharmacy because it produces a isoquinoléïque Alcaloïde: the Hydrastine vasoconstrictrice.

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