Synonyms: Crypsinus engleri (homotypic); Crypsinus engleri var. coriaceus; Phymatodes engleri (homotypic); Phymatodes engleri var. coriacea; Phymatopsis engleri (homotypic); Phymatopsis engleri var. coriacea; Phymatopsis engleri var. hypoleuca; Phymatopsis pellucidifolia; Phymatopteris engleri (homotypic); Phymatopteris pellucidifolia; Polypodium engleri (homotypic); Polypodium engleri hypoleuca; Polypodium engleri var. hypoleucum; Polypodium hastatum engleri; Polypodium hastatum var. engleri; Polypodium pellucidifolium; Selliguea pellucidifolia