adder's tongue

(redirected from Adderstongue)
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Noun1.adder's tongue - ferns with fertile spikes shaped like a snake's tongueadder's tongue - ferns with fertile spikes shaped like a snake's tongue
fern - any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores
genus Ophioglossum, Ophioglossum - the type genus of the fern family Ophioglossaceae
Ophioglossum pendulum, ribbon fern - epiphytic fern with straplike usually twisted fronds of tropical Asia and Polynesia and America