Flower Macro - Tiny Tuesday

First of all may I say a big thank you to all of you who commented, starred and favourited yesterday's blip. I thought my blip birthday was going to be today and I wanted to make it a bit more festive than yesterday's IR. As flowers form a good proportion of my blip entries I thought a flower macro would be appropriate (focus stacked from 3 images taken under my digital microscope).

I have previous identified this flower as being St.John's Wort but having looked closely at internet.images I am having second thoughts. Any ideas ?