Athyrium palmense (Christ) Lellinger Athyrium palmense (Christ) Lellinger, Proc. Biol. Soc. Washington 89(61): 708. 1977 sec. Mickel & Smith 2004≡Cystopteris fragilis var. palmensis Christ, Bull. Herb. Boissier ser. 2, 7: 264. 1907 syn. sec. Mickel & Smith 2004