"Streptophyta" . . "Ophioglossales" . . . . "Sceptridium" . "(Brack.) W.H. Wagner" . "Sceptridium subbifoliatum" . "Island Grapefern" . . "Ophioglossaceae" . "Ophioglossopsida" . "Sceptridium subbifoliatum (Brack.) W.H. Wagner" . . "Plantae" . . . . . . . . .