. . "Longstem Adderstongue" . . . . . . "Ophioglossaceae" . . . "Ophioglossum petiolatum Hook." . "Ophioglossum" . "Ophioglossum petiolatum" . . . "Hook." . "Streptophyta" . "Ophioglossopsida" . "Ophioglossales" . . . "Plantae" . .