plantenrijk Haeckel (1866) - plants
   [Division] Protophyta Sachs 1874 - primitive plants
     Class Schizomycetes Nägeli 1857 (Approved Lists 1980) - bacteria and related forms
       Order Eubacteriales Buchanan 1917 (Approved Lists 1980) see Order Clostridiales Prévot 1953 (Approved Lists 1980)
         Family Rhizobiaceae Conn 1938 (Approved Lists 1980)
           1 Genus Agrobacterium Conn 1942 (Approved Lists 1980) see Genus Rhizobium Frank 1889 (Approved Lists 1980)
           2 Genus Rhizobium Frank 1889 (Approved Lists 1980)