Asplenium rhizophyllum Linnaeus. Walking Fern. Phen: May-Oct. Hab: Moist outcrops of calcareous sedimentary, calcareous metamorphic, or mafic metamorphic rocks, such as limestone, dolostone, calcareous siltstone, amphibolite, mostly at low to moderate elevations, rarely to 1500 m or higher. Dist: S. QC, ON and se. MN south to c. GA, AL, MS, AR, OK, and IA.
Origin/Endemic status: Native
Syn: = Ar, C, FNA2, GrPl, Il, K1, K3, K4, Mo1, NE, NY, Ok, Pa, RAB, Tn, Va, W, Keener & Davenport (2007); = Camptosorus rhizophyllus (L.) Link – F, G, Sf, Tat, WV