- Ophioglossaceae, family Ophioglossaceae - a family of succulent ferns of order Ophioglossales; cosmopolitan in distribution
--1 is a kind of fern family
--1 is a member of Ophioglossales, order Ophioglossales
--1 has members:Ophioglossum, genus Ophioglossum; Botrychium, genus Botrychium; Helminthostachys, genus Helminthostachys