adder's tongue

Noun
  1. Ferns with fertile spikes shaped like a snake's tongue (synset 112981138)
    is a type of: fern - any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores
    subtypes: ophioglossum pendulum, ribbon fern - epiphytic fern with straplike usually twisted fronds of tropical Asia and Polynesia and America
    belongs to: genus ophioglossum, ophioglossum - the type genus of the fern family Ophioglossaceae
    same as: adder's tongue fern

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