Tracheary Elements in Secondary Xylem of Actaea asiatica (Ranunculaceae) Does Actaea asiatica Have the Most Symmetric and Primitive Karyotype in the Ranunculaceae? Triterpenoids from Actaea asiatica with antitumor activity A new cycloartane triterpene saponin from rhizome of Actaea asiatica Study on chemical constituents from rhizomes of Actaea asiatica