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hart's-tongue fern, hart's-tongue, Olfersia cervina, Polybotrya cervina, Polybotria cervina | tropical American terrestrial fern with leathery lanceolate fronds; tropical American terrestrial fern with leathery lanceolate fronds; sometimes placed in genus Polybotrya ❲Olfersia cervina, Polybotria cervina, Polybotrya cervina❳ |