Quick definitions from WordNet (hart's-tongue)
▸ noun: Eurasian fern with simple lanceolate fronds
▸ noun: tropical American terrestrial fern with leathery lanceolate fronds; sometimes placed in genus Polybotrya
▸ noun: Eurasian fern with simple lanceolate fronds
▸ noun: tropical American terrestrial fern with leathery lanceolate fronds; sometimes placed in genus Polybotrya