#marsh_elder__marshelder__iva  any of various coarse shrubby plants of the genus Iva with small greenish flowers; common in moist areas (as coastal salt marshes) of eastern and central North America
  supertype:  #marsh_plant__marshplant__bog_plant__bogplant__swamp_plant__swampplant  a semi-aquatic plant that grows in soft wet land; most are monocots: sedge, sphagnum, grasses, cattails, etc; possibly heath
  member of:  #genus_Iva
  subtype:  #burweed_marsh_elder__false_ragweed__falseragweed__Iva_xanthifolia  tall annual marsh elder common in moist rich soil is central North America that can cause contact dermatitis; produces much pollen that is a major cause of hay fever

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