Hi JochenZeil, thanks for your sighting. It looks like your sighting contains multiple species. To help us verify each species, please submit each species as a separate sighting. You can edit this sighting and click the duplicate button to make a duplicate of the original sighting. I'm guessing you wanted to know what the galls are...
I can see the glands on the rib between the pinnules in the leaf in side view. Difficult to tell apart from A. mearnsii. Look at the first pic at Acacia mearnsii showing the dark colour of the branchlets for A. mearnsii. A. parramattensis does not have that colour, I think.