. "Ceratopteridaceae" . . "Parkeriaceae" . "Ceratopteridoideae"@en . . . . "Ceratopteridoideae is one of the five subfamilies in the Pteridaceae family of ferns. It includes only the two genera Acrostichum and Ceratopteris. The following diagram shows a likely phylogenic relationship between the two Ceratopteridoideae genera and the other Pteridaceae subfamilies."@en . "'Parkeroideae'" .