#adder's_tongue_fern__adder's_tongue__adder'stongue  ferns with fertile spikes shaped like a snake's tongue
  supertype:  fern  any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores
  member of:  genus_Ophioglossum
  subtype:  Ophioglossum_pendulum__ribbon_fern  epiphytic fern with straplike usually twisted fronds of tropical Asia and Polynesia and America

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