mystery tree– ID please?

mystery tree– ID please?

I never saw these before but the mature trees are lovely, they are not tgoo tall, oval in shape and flower a very pale green, I believe this is a baby one but what is it? http://i39.photobucket.com/albums/e166/paleriter/mystery-tree3.jpg it looks like it could be messy after blooming, is it a well-behaved tree? TIA.
Shroooms

Shroooms

Garden Photos!

Garden Photos!

My Patio Garden

My Patio Garden

How to make it look like an 18 year olds room

How to make it look like an 18 year olds room

Bluebells

Bluebells

New edition to my “plant family”! hehe.

New edition to my “plant family”! hehe.