plantenrijk Haeckel (1866) - plants
   [Division] Protophyta Sachs 1874 - primitive plants
     Class Schizomycetes Nägeli 1857 (Approved Lists 1980) - bacteria and related forms
       1 Order Pseudomonadales Orla-Jensen 1921 (Approved Lists 1980)
       2 Order Eubacteriales Buchanan 1917 (Approved Lists 1980) see Order Clostridiales Prévot 1953 (Approved Lists 1980)
       3 Order Chlamydobacteriales
       4 Order Actinomycetales Buchanan 1917 (Approved Lists 1980)
       5 Order Myxobacteriales
       6 Order Spirochaetales Buchanan 1917 (Approved Lists 1980)
       7 Order Beggiatoales Buchanan 1957 (Approved Lists 1980) see Order Thiotrichales Garrity et al. 2005
       8 Order Hyphomicrobiales Douglas 1957 (Approved Lists 1980) see Order Rhizobiales Kuykendall 2006