Clues on the ground

All trees have flowers but usually high up where the sun can reach the twigs.  Often the first evidence is flowers or bud scales on the ground.  

I found these fallen cherry flowers on the ground between posts 15 and 16 in the tunnel through the old council tree nursery.  

There is a row of ornamental Japanese flowering cherries there, which I had forgotten about.  

So when walking I try to remember to look up above and down on the ground as well as straight ahead.  Maybe that's why I trip over so often.