Subfamily
Botrychioideae
Sceptridium multifidum. Photo: (c) Ken-ichi Ueda, some rights reserved (CC BY)
Ophioglossaceae, the adder’s-tongue family, is a family of ferns (though some studies have instead suggested a closer relationship to angiosperms), currently thought to be most closely related to Psilotaceae, the two together comprising the class Ophioglossidae as the sibling group to the rest of the ferns. The Ophioglossaceae is one of two groups of ferns traditionally known as eusporangiate ferns.
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