Nature Wallpaper: Sharing the Sunshine

This has become one of my rare ‘hits’ on Flickr. Nice.

Wallpaper 635: Light of Spring

Calling All Botanists: Calling All Botanists 2!

I’ve found this blossom in the grounds of my local village hall. I’ve checked my tree book and I’ve been on-line; but I can’t figure out what it is. Any ideas?

I’m very pretty: but what am I?