What class of plant/flower is this? http://joganelken.deviantart.com/art/Jap...

http://joganelken.deviantart.com/art/Jap...
Wet walls and fanlight sills contained by the...
Answers:    I don't think it's cherry blossom. I infer it's Chaenomelaes (Japanese quince). I have one contained by my garden in London, and it flowers earlyish Spring.
Cheapest flowers online?
It's a Japanese Cherry Blossom. Very pretty!! If you necessitate more info, just google it and consequently press images to see more pictures of it!
Goodluck and hope that help!