"serpent-grass" meaning in English

{
  "head_templates": [
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      "expansion": "serpent-grass (uncountable)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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          "kind": "other",
          "name": "English entries with incorrect language header",
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        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Buckwheat family plants",
          "orig": "en:Buckwheat family plants",
          "parents": [
            "Caryophyllales order plants",
            "Plants",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
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          "source": "w"
        }
      ],
      "glosses": [
        "alpine bistort (Bistorta vivipara)."
      ],
      "id": "en-serpent-grass-en-noun-LjDKnAAi",
      "tags": [
        "uncountable"
      ],
      "translations": [
        {
          "code": "nb",
          "lang": "Norwegian Bokmål",
          "sense": "Translations",
          "word": "harerug"
        },
        {
          "code": "nn",
          "lang": "Norwegian Nynorsk",
          "sense": "Translations",
          "tags": [
            "masculine"
          ],
          "word": "harerug"
        },
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          "code": "ru",
          "lang": "Russian",
          "roman": "goréc živorodjaščij",
          "sense": "Translations",
          "tags": [
            "masculine"
          ],
          "word": "горе́ц живородящий"
        },
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          "code": "sv",
          "lang": "Swedish",
          "sense": "Translations",
          "word": "ormrot"
        }
      ]
    }
  ],
  "word": "serpent-grass"
}

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      "expansion": "serpent-grass (uncountable)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        "en:Buckwheat family plants"
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      "glosses": [
        "alpine bistort (Bistorta vivipara)."
      ],
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        "uncountable"
      ]
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  ],
  "translations": [
    {
      "code": "nb",
      "lang": "Norwegian Bokmål",
      "sense": "Translations",
      "word": "harerug"
    },
    {
      "code": "nn",
      "lang": "Norwegian Nynorsk",
      "sense": "Translations",
      "tags": [
        "masculine"
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      "word": "harerug"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "goréc živorodjaščij",
      "sense": "Translations",
      "tags": [
        "masculine"
      ],
      "word": "горе́ц живородящий"
    },
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      "code": "sv",
      "lang": "Swedish",
      "sense": "Translations",
      "word": "ormrot"
    }
  ],
  "word": "serpent-grass"
}