def _get_specie_str(specie, include_phase):
    """Gets the specie string

    Parameters
    ----------
        specie : :class:`~pmutt.empirical.nasa.Nasa` object
            Specie to use
        include_phase : bool, optional
            If True, includes the reaction phase. Default is True
    Returns
    -------
        specie_str : str
            Species string
    """
    if include_phase:
        if specie.phase.upper() == 'G':
            phase = '/GAS/'
        elif specie.cat_site is not None:
            phase = '/{}/'.format(specie.cat_site.name)
        else:
            err_msg = 'Must specify phase or catalyst site to include phase.'
            raise ValueError(err_msg)
    else:
        phase = ''
    return "'{}{}'".format(specie.name, phase)