hart's-tongue fern (Noun) — Tropical American terrestrial fern with leathery lanceolate fronds; sometimes placed in genus Polybotrya.
hart's-tongue fern (Noun) — Eurasian fern with simple lanceolate fronds.
hart's-tongue fern (Noun) — Common epiphytic or sometimes terrestrial fern having pale yellow-green strap-shaped leaves; Florida to West Indies and Mexico and south to Uruguay.