I recorded this to show the terminal buds, different from the spines on https://canberra.naturemapr.org/sightings/4571071. I thought this helped distinguishing between Manchurian pear and Callery pear, but perhaps it is just different cultivars. Forest 87 at the National Arboretum Pyrus calleryana 'Chanticleer' does not have spines (not that I looked closely).