Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981) Subkingdom Pteridobiotina Britton & A. Br. (1896) Superdivision Pteridophytanae Doweld (2001) [monotypic] see Superphylum Pteridophytanae Doweld (2001) Division Monilophyta Cantino & Donoghue Class Equisetopsida C.Agardh (1825) - horsetails see Subclass Equisetidae Warm. (1883) Order Equisetales DC. ex Bercht. & J.Presl (1829) Family Equisetaceae Michx. ex DC. (1804) - horsetails Genus Equisetum L. (1753)