[galaxy-dev] tool parameter attribute for option display value (not passed value)?

Hi, For a tool select input parameter: <param name="input1" type="select"> <option value="hs33">Homo sapiens</option> <option value="mm19">Mus musculus</option> <option value="rn43">Rattus norvegicus</option> </param> Is there an attribute for the variable $input1 that will give me the displayed value (e.g. Homo sapiens, not hs33)? thank you, Leandro