| adder's tongue | (n) ferns with fertile spikes shaped like a snake's tongue, Syn. adder's tongue fern |
| felt fern | (n) east Asian fern having fronds shaped like tongues; sometimes placed in genus Cyclophorus, Syn. Pyrrosia lingua, Cyclophorus lingua, tongue fern |
| florida strap fern | (n) common epiphytic or sometimes terrestrial fern having pale yellow-green strap-shaped leaves; Florida to West Indies and Mexico and south to Uruguay, Syn. hart's-tongue fern, cow-tongue fern |
| hart's-tongue | (n) tropical American terrestrial fern with leathery lanceolate fronds; sometimes placed in genus Polybotrya, Syn. Polybotrya cervina, hart's-tongue fern, Polybotria cervina, Olfersia cervina |
| hart's-tongue | (n) Eurasian fern with simple lanceolate fronds, Syn. hart's-tongue fern, Asplenium scolopendrium, Phyllitis scolopendrium |