Trigger plants are so called because they have a spring loaded “trigger” that springs to hit insects and dab them with pollen to transfer it to other trigger plants. I think this one is Stylidium graminifolium.
You can see that this bee has already triggered the one that he has just visited, and one other on the other side. Looks like it probably smacked him in the forehead.
And now that you know where to look you, if you look carefully you will be able to see the other triggers still primed under the flowers.
My back yard
Canon 5D mark 2
EF 100mm F/2.8 Macro USM