Looks like ………

……. Late spring snow. The white is the fluffy cotton-wool-like material fallen/blown off nearby a poplar tree. That variety of poplar may be known as a “Cottonwood” tree.
We have had a glorious sunny day, a cloudless sky and very warm. In fact it was a bit too warm with over 29C in the shade in our porch. I had an afternoon visit from friend Lynette. We sat outdoors under the cool shade of the wisteria and cherry tree drinking cold sparkling water. Good company. Bliss.