Kingdom [Plantae] Haeckel (1866) - plants
   Division Pteridophyta Schimp. (1879) see Subphylum Pteridophytina (Eichler) Cavalier-Sm. (1998)
     Class Equisetopsida C.Agardh (1825) - horsetails see Subclass Equisetidae Warm. (1883)
       Order †Bowmanitales - sphenophylls see Order Sphenophyllales Wettst. (1903)
         1 Family †Bowmanitaceae S.V.Meyen (1978) see Family Sphenophyllaceae Warm. (1891)
         2 Family †Eviostachyaceae
         3 Family †Cheirostrobaceae D.H.Scott (1902) see Family Sphenophyllaceae Warm. (1891)