. . . . . "Ophioglossum, the adder's-tongue ferns, is a genus of about 25-30 species of ferns in the family Ophioglossaceae, of the order Ophioglossales. The name Ophioglossum comes from the Greek, and means \"snake-tongue\".Their cosmopolitan distribution is mainly in tropical and subtropical habitats."@en . "Ophioglossum"@en . . .