What is (a) The small applelike berry of American trees of genus Amelanchier; -- also called service berry. (b) The shrub or tree which bears this fruit; -- also called shad bush, and had tree called?

juneberry — (a) The small applelike berry of American trees of genus Amelanchier; -- also called service berry. (b) The shrub or tree which bears this fruit; -- also called shad bush, and had tree. (Webster's 1913.)