The artist really tried to stress his interest in the one tree only :)

Your poem comments on the cycle of life and I admit, I too find it troubling when I see so much beauty being treated so badly by Time - Time really is a lout, without appreciation of the finest in life? Well, afterwards, when I've regained my perspective, I realise that time is what made the beauty possible and it is not wiping out what it created - it is just preparing the canvas for the next painting.

This bit nags at me as not being right:

And only memory
Fill the emptiness.