Trees - large plants with tiny flowers!

Unfortunately we are coming to the end of the "Blooming Tree" season.

I find it a surprising fact that some of the largest living organisms on earth - trees - have some of the tiniest flowers! And because they are generally up above our human eye level, most people don't notice them at all. 

Here are just a few.  Click for a larger image and to find the species......

Of course, there are notable exceptions, such as the Horse Chestnut...