Cystopteris membranifolia Mickel Cystopteris membranifolia Mickel, Amer. Fern J. 62: 93, f.1. 1972 sec. Mickel & Smith 2004Holotype: Mexico, Oaxaca: Distrito Teotitlán, about 33 km NE of Teotitlán del Camino on road to Huautla, Mickel 4544 (NY)