GLEBE TREES AND SHRUBS

Pin cherry (Prunus pensylvanica)
  
Leaves

Fletcher's - Arboretum. 
Leaves are lanceolate, tilted back and folded somewhat.




Flowers

Fletcher's - Arboretum. 


Notes
Not sure if I've seen one in the Glebe.



Similar species
List of trees and shrubs with alternate, simple, toothed leaves