#lady_fern__Athyrium_filix-femina  most widely grown fern of the genus Athyrium for its delicate foliage
  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_Athyrium
  subtype:  #Alpine_lady_fern__Athyrium_distentifolium  a lady fern with deeply cut leaf segments; found in the Rocky Mountains

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