Alert Flowerophile Donna is really on the ball here, spotting a bunch of these little trees at Centennial. They are full of these big white blossoms and I can’t believe I never noticed them in previous years. These are native to the U.S., but primarily occur in more southern regions (like South Carolina to Texas), so I don’t know if these might have wandered out from someone’s yard? They’re very striking.
Silver bell, Snowdrop tree (Halesia diptera)