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Definition of Adder's tongue fern
1. Noun. Ferns with fertile spikes shaped like a snake's tongue.
Exact synonyms: Adder's Tongue
Generic synonyms: Fern
Group relationships: Genus Ophioglossum, Ophioglossum
Specialized synonyms: Ophioglossum Pendulum, Ribbon Fern
Generic synonyms: Fern
Group relationships: Genus Ophioglossum, Ophioglossum
Specialized synonyms: Ophioglossum Pendulum, Ribbon Fern