"green bulrush" meaning in English

{
  "forms": [
    {
      "form": "green bulrushes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "green bulrush (plural green bulrushes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Sedges",
          "orig": "en:Sedges",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A plant of the species Scirpus atrovirens"
      ],
      "id": "en-green_bulrush-en-noun-CVlTiAKI",
      "synonyms": [
        {
          "sense": "Scirpus atrovirens",
          "word": "woolgrass bulrush"
        }
      ]
    }
  ],
  "word": "green bulrush"
}

{
  "forms": [
    {
      "form": "green bulrushes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "green bulrush (plural green bulrushes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Entries using missing taxonomic name (species)",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Sedges"
      ],
      "glosses": [
        "A plant of the species Scirpus atrovirens"
      ]
    }
  ],
  "synonyms": [
    {
      "sense": "Scirpus atrovirens",
      "word": "woolgrass bulrush"
    }
  ],
  "word": "green bulrush"
}