plants Haeckel (1866) - plants Division Charophyta Migula (1889) - charophyte algae and embryophytes see charophytes Subdivision [Streptophytina] see [unranked] Streptophytina Lewis & McCourt (2004) Class Equisetopsida C.Agardh (1825) - horsetails see Subclass Equisetidae Warm. (1883) Vascular Plants see Phylum Tracheophyta Sinnott ex Caval.-Sm. (1998) [Ferns] Subclass Ophioglossidae Klinge (1882) Order Ophioglossales Link (1833) [monotypic] Family Ophioglossaceae Martinov (1820) - ophioglossoids Genus Helminthostachys Kaulf. (1824)