| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Ophioglossaceae | Ophioglossum crotalophoroides | Bulbous Adder’s-tongue | Moist ditch banks, grassy roadside flats, lawns, cemeteries, moist pine woodlands. | E. North Carolina (Dare County) south to Florida and west to c. Texas; also in Mexico, the West Indies, Central America, and South America. |  (c) Cressler, Alan M. |
| Ophioglossaceae | Ophioglossum engelmannii | Engelmann’s Adder’s-tongue, Limestone Adder’s-tongue | Dry barrens and glades over calcareous rocks, very rarely on granite. | W. Virginia, Indiana, Illinois, Kansas, and Arizona south to Panhandle Florida and Texas; Mexico and Central America. Ascribed to North Carolina by Wagner & Wagner in FNA (1993b), the documentation unknown. |  (c) Cressler, Alan M. |
| Ophioglossaceae | Ophioglossum nudicaule | Slender Adder’s-tongue | Pine flatwoods, lawns, and other moist, grassy areas. | E. North Carolina south to s. Florida, west to Texas; West Indies; Mexico, Central, and South America; Asia; Africa. First reported from North Carolina by Thomas & Marx (1979). |  (c) Cressler, Alan M. |
| Ophioglossaceae | Ophioglossum petiolatum | Long-stem Adder’s-tongue | Maritime wet grasslands, wet pine flatwoods, moist ditch banks, and grassy roadside flats. | Se. Virginia south to Florida and west to Texas and Oklahoma; West Indies; Central America to n. South America; Asia. |  (c) Bradley, Keith |
| Ophioglossaceae | Ophioglossum pusillum | Northern Adder’s-tongue | Wet meadows, swamp edges. | Nova Scotia west to North Dakota and British Columbia, south to w. Virginia, n. Indiana, n. Illinois, and w. Nebraska, w. Wyoming, w. Montana, and California. | |
| Ophioglossaceae | Ophioglossum pycnostichum | Southern Adder’s-tongue | Bottomland forests, moist loamy soils of successional forests and old fields. | S. New Jersey, Indiana, Illinois, and s. Michigan south to Georgia, Mississippi, and e. Texas; s. Mexico. |  (c) Cressler, Alan M. |