Acrostichum ferruginosum Linnaeus, Species Plantarum, ed. 2, 2: 1525. 1763.

"Habitat in America." RCN: 7774.

Lectotype (designated here by Reveal): [icon] "Filici-folia s. Polypodium tenuifolium minus Virginianum" in Plukenet, Phytographia: t. 89, f. 9. 1691; Almag. Bot.: 153. 1696. - Typotype: Herb. Sloane 96: 39 (BM-SL) .

Current name: Polypodium polypodioides (L.) Watts var. michauxiana Weath. ( Polypodiaceae).

Note: See comments by Weatherby (in Contr. Gray Herb. 74: 24. 1939).