Those are for visiting the site, you get 1 each 24 hr period that you log in, also anytime you post an answer to a question, those in the community can send you a flower by clicking on the "orange"flower by your question or answer. You can only vote once. You will see the flower turn gray after you have sent a flower. At this time it is a mystery what the significance of them are. It is something to be named by the site administrator at a later time. I hope that makes sense and here's you a flower! ;)