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Family	Scientific Name	Common Name	Habitat	Distribution
Ophioglossaceae	Ophioglossum crotalophoroides	Bulbous Adder’s-tongue	Moist ditch banks, grassy roadside flats, lawns, cemeteries, moist pine woodlands.	E. NC (Dare County) south to FL and west to c. TX; also in Mexico, the West Indies, Central America, and South America.
Ophioglossaceae	Ophioglossum engelmannii	Engelmann’s Adder’s-tongue, Limestone Adder’s-tongue	Dry barrens and glades over calcareous rocks, very rarely on granite.	W. VA, IN, IL, KS, and AZ south to Panhandle FL and TX; Mexico and Central America.
Ophioglossaceae	Ophioglossum nudicaule	Slender Adder’s-tongue	Pine flatwoods, lawns, and other moist, grassy areas.	E. NC south to s. FL, west to TX; West Indies; Mexico, Central, and South America; Asia; Africa.
Ophioglossaceae	Ophioglossum petiolatum	Long-stem Adder’s-tongue	Maritime wet grasslands, wet pine flatwoods, moist ditch banks, and grassy roadside flats.	Se. VA south to FL and west to TX and OK; West Indies; Central America to n. South America; Asia.
Ophioglossaceae	Ophioglossum pusillum	Northern Adder’s-tongue	Wet meadows, swamp edges.	NS west to ND and BC, south to w. VA, n. IN, n. IL, and w. NE, w. WY, w. MT, and CA.
Ophioglossaceae	Ophioglossum pycnostichum	Southern Adder’s-tongue	Bottomland forests, moist loamy soils of successional forests and old fields.	S. NJ, IN, IL, and s. MI south to GA, MS, and e. TX; s. Mexico.