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 Bacillaceae Fischer 1895 (Approved Lists 1980)
           1 Genus Bacillus Cohn 1872 (Approved Lists 1980)
           2 Genus Clostridium Prazmowski 1880 (Approved Lists 1980)