[flexcoders] Find parent of selected item in tree

[dffmyco]

I just can not seem to figure out how to get the
parent of a selected item ([EMAIL PROTECTED]).
In this case I need to know the genus name when a species is 
selected. Note that a species name is not unique to a genus name, 
Uromyces ingae and Puccinia ingae       

        public var nameData:XML = <allData>
                  <genus name="Uromyces">
                    <species name="ingae"/>
                    <species name="elegans"/>
                    <species name="dolicholi"/>
                  </genus>
                  <genus name="Ravenelia">
                    <species name="irregularis" />
                  </genus>
                  <genus name="Puccinia">
                    <species name="ingae"/>
                    <species name="manoelae"/>
                    <species name="longirostris"/>
                  </genus>

                </allData>

Thanks, Dave