We have saskatoon berries growing in our backyard, our neighbour's yard, all over (east toronto). they are very tastey have a sort of vanilla like aftertaste. I think that they are also known as serviceberries. they will be in fruit in about 7 weeks:
links:
http://www.cbc.ca/story/canada/natio...ry_041115.html
http://www.gov.mb.ca/agriculture/cro.../bld01s00.html
http://www.thecanadianencyclopedia.c...=J1ARTJ0007163