| Cystopteris protrusa (Weath.) Blasdell |
| Currently Accepted Name: | Cystopteris protrusa (Weath.) Blasdell |
| Locality: | United States. Kentucky. Monroe: Old Mulkey Meeting House State Historic Site, 0.2 mi south of Tomkinsville, adjacent to KY 1446 at latitude 36°40'47 N and longitude 85°42'29 W, Tomkinsville Quadrangle. Eastern Highland Rim of Interior Low Plateau. Elevation ranges from 800-900 feet. |
| Habitat: | Mississippian shaly siltstones and limestones; Garmon-Lowell-Waynesboro soils. Elevation ranges from 800-900 feet. Native perennial; scarce; shaley hillside of Mixed Mesophytic Forest. |
| Collector: | Ralph L. Thompson, Ronald L. Jones 09-668 |