WordNet (r) 3.0 (2006):

serviceberry
    n 1: any of various North American trees or shrubs having showy
         white flowers and edible blue-black or purplish fruit [syn:
         Juneberry, serviceberry, service tree, shadbush,
         shadblow]
    2: edible purple or red berries [syn: saskatoon,
       serviceberry, shadberry, juneberry]