"softstem rush" meaning in English

{
  "forms": [
    {
      "form": "softstem rushes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "head": "softstem rush"
      },
      "expansion": "softstem rush (plural softstem rushes)",
      "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": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Sedges",
          "orig": "en:Sedges",
          "parents": [
            "Commelinids",
            "Plants",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A plant of the species Schoenoplectus tabernaemontani, native to almost all of North America."
      ],
      "id": "en-softstem_rush-en-noun-WpKTesgz",
      "synonyms": [
        {
          "sense": "Schoenoplectus tabernaemontani",
          "word": "softstem bulrush"
        },
        {
          "sense": "Schoenoplectus tabernaemontani",
          "word": "great bulrush"
        }
      ]
    }
  ],
  "word": "softstem rush"
}

{
  "forms": [
    {
      "form": "softstem rushes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "head": "softstem rush"
      },
      "expansion": "softstem rush (plural softstem rushes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys",
        "Entries using missing taxonomic name (species)",
        "en:Sedges"
      ],
      "glosses": [
        "A plant of the species Schoenoplectus tabernaemontani, native to almost all of North America."
      ]
    }
  ],
  "synonyms": [
    {
      "sense": "Schoenoplectus tabernaemontani",
      "word": "softstem bulrush"
    },
    {
      "sense": "Schoenoplectus tabernaemontani",
      "word": "great bulrush"
    }
  ],
  "word": "softstem rush"
}