| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Cystopteridaceae | Cystopteris bulbifera | Bulblet Fern, Bulblet Bladder Fern | Moist outcrops and talus of calcareous rocks, rarely up to 1500 m elevation. | NL (Newfoundland) west to MN, south to NC, nw. SC (Oconee County), nw. GA, AL, and AR; also disjunct in UT, AZ, NM, and w. TX. |  |
| Cystopteridaceae | Cystopteris fragilis | Fragile Fern, Brittle Fern | Cliffs, ascending in our area to 1650 m. | Circumboreal, in North America ranging from NL (Newfoundland) west to AK, south to MA, CT, NJ, montane NC, w. OK, NM, and AZ; Central America. |  |
| Cystopteridaceae | Cystopteris laurentiana | Laurentian Fragile Fern | Calcareous cliffs and ledges. | NL west to ON, south to MA, PA, n. IL, and e. IA. |  |
| Cystopteridaceae | Cystopteris protrusa | Lowland Bladder Fern | Rich woods or on moss- and soil-covered talus in boulderfields, loess bluffs, occasionally on ledges of rock outcrops. | NY and ON west to MN, south to GA, Panhandle FL (Washington and Gadsden counties) (Wunderlin & Hansen 2006; L. Byrd, pers.comm., 2020), AL, MS, LA, e. TX, and OK. |  |
| Cystopteridaceae | Cystopteris tennesseensis | Tennessee Bladder Fern | Moist to dry outcrops of calcareous rocks, including coquina limestone (‘marl’) in the outer Coastal Plain. | PA, KY, IL, WI, and IA south to NC, nw. GA, n. AL, AR, and OK. |  |
| Cystopteridaceae | Cystopteris tenuis | Mackay's Fragile Fern, Mackay's Bladder Fern | Moist outcrops and cliffs of metamorphic and sedimentary rocks, occasionally in moist soils near rock outcrops or moist soil banks. | NL (Newfoundland) west to MN and NE, south to VA, IL, MO, and AR (Peck 2011), and in the mountains to NC, TN, and n. GA. |  |
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