Japanese tree lilac. I think that is the new urban planting on McLure’s Mills Road …leading to the hospital and the RECC. My sample is from Lower Truro, adjacent to where I keep bees, and the honeybees are feasting on it … along with many native bees. I think blossoms fall when a flower is pollinated. This morning while i was beekeeping there was no wind, but near the lilac tree the air was full of confetti. The Japanese tree lilac “Ivory Silk” is hardy to zone 3, smells nice, grows to 30 feet, resists pests, and attracts pollinators. What’s not to like? I want to get one.