Polypodium retroflexum Linnaeus, Species Plantarum 2: 1089. 1753.

"Habitat in America." RCN: 7890.

Lectotype (Proctor & Lourteig in Bradea 5: 385. 1990): [icon] "Filicula alis inferioribus pendulis" in Petiver, Pteri-graphia Amer.: 72, t. 1, f. 9. 1712.

Current name: Thelypteris retroflexa (L.) Proctor & Lourteig ( Thelypteridaceae).