Cut and treated and mapped with Field Maps / Treated Weeds / Woody weeds; most likely from a garden extension / mature Golden Rain Tree planted in reserve further south.
All the others north of French St are identified as K. paniculata. Back in July 2024 @MichaelBedingfield removed K. elegans from the local species list when I said "The entry image for Koelreuteria elegans has been re-identified as Koelreuteria paniculata and should be removed (the whole entry should be removed as there are no sightings)."