Prunus serrulata IDed by cherry-esque thin shiny bark with lenticels and pink flowers. I feel like cherry trees at this time of year are quite easy to identify from afar, since they are really the only trees in the city that have a gradient of red leaves at the top and greener leaves at the bottom with flowers interspersed. Gingkos and zelkovas are also really distinct from afar at this time of year because of their prominent leaves and general shape.