"marsh elder" meaning in English

{
  "forms": [
    {
      "form": "marsh elders",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "marsh elder (plural marsh elders)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Any plant of the genus Iva, native to North America."
      ],
      "id": "en-marsh_elder-en-noun-nMWQVU-p",
      "links": [
        [
          "Iva",
          "Iva#Translingual"
        ]
      ],
      "related": [
        {
          "word": "salt marsh elder"
        }
      ],
      "synonyms": [
        {
          "word": "marshelder"
        }
      ]
    }
  ],
  "word": "marsh elder"
}

{
  "forms": [
    {
      "form": "marsh elders",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "marsh elder (plural marsh elders)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "salt marsh elder"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry"
      ],
      "glosses": [
        "Any plant of the genus Iva, native to North America."
      ],
      "links": [
        [
          "Iva",
          "Iva#Translingual"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "word": "marshelder"
    }
  ],
  "word": "marsh elder"
}