Help with HTML form

Sorry for the title of the post, is that I'm not thinking about something to specify what I'm wanting (feel free to edit). It is as follows:

I have an html form and a button:

<form id="formflor" method="post">

  <input type="text" class="form-control" id="codigo" name="codigo" placeholder="código de barras">
  <input type="text" class="form-control" id="nome" name="nome" placeholder="Rosa">
  <textarea class="form-control" id="informacoes" name="informacoes" rows="3" placeholder="descreva aqui..."></textarea>
  <input type="file" id="imagem" name="imagem">
  <button type="button" class="btn btn-primary" onclick="editaFlor(1, 'jasmim');">Enviar dados</button>
</form>

that when clicked calls a jquery function:

function editaFlor(id, descricao){
  if (confirm("Confirma a alteração de " + descricao + "?"))
  {
    var myForm = document.getElementById('formflor');
    var form = new FormData(myForm);

    $.ajax({
      type: "POST",
      url: "functions/editarFlor.php",
      data: form,
      cache: false,
      contentType: false,
      processData: false,
      success: function(data) {
        if (data == 'ok'){
          alert(descricao + ' editado com sucesso!');
          listaFlor();
        }
        else{
          alert(data);
        }
      }
    });
  }
}

This form works normally, and I need to include the id parameter in the form form and send it along with the form data.

Is there any way to do this?