 The occurrence of "Arabis glabra", "Geum urbanum", "Agiimonia eupatoria", "Eupatorium cannabinum", "Cavpesium cernuum" and some others may therefore readily be disputed as indigenous, and some questions concerning the nativity of various of our plants will probably remain for ever involved in doubts.In 1889 an updated edition of the census was published, the "Second Systematic Census" increased the number of described species to 8839.Von Mueller dedicated both works to Joseph Dalton Hooker and A. P. de Candolle.