| Aspleniaceae | Asplenium resiliens | Blackstem Spleenwort | Moist to dry outcrops of calcareous sedimentary or metamorphic rocks, such as limestone, dolostone, coquina, or marble, sometimes on narrow seams of calcareous materials in otherwise acidic rocks, rarely on mortar or concrete, mostly at low to moderate elevations, but remarkably on Grandfather Mountain at over 1800 m. | Sc. PA, sw. OH, KY, s. IL, MO, se. KS, OK, TX, CO, and s. NV south to FL, TX, AZ, and Mexico; West Indies; Central America and South America. Recently rediscovered in sw. OH (Adams County) along a dolomite OH River bluff after not being seen in the state since its first collection in 1900 (I. Copen, pers. comm., 2022). | 
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| Aspleniaceae | Asplenium heteroresiliens | Marl Spleenwort, Carolina Spleenwort, Wagner's Spleenwort, Morzenti's Spleenwort | Fairly moist outcrops of calcareous sedimentary rocks, such as coquina limestone (‘marl’), along small blackwater streams or larger rivers, at low elevations, and rarely also on old ruins made of tabby (a cement made from lime, sand, and oyster shells). | Rare and scattered from se. NC to se. GA, sw. GA, n. FL, and s. AL, on the Coastal Plain. First report for AL (Covington County) reported by Yawn et al. (2024). | 
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