No Idea

We went to a local garden centre this morning, I wanted coffee and cake and although we've always got coffee, we had no cake. The need was satisfied by a Rum Baba. I haven't had one for ages , you don't see them in shops around here anymore. Then as we walked around looking at green growing things, I spotted this blip worthy but unidentified flower (?), the  open one is about 2cm diameter.