Prunus yedoensis 'Akebono'sakura. The lineage of Japanese cherries is confused with nearly every village (and neighborhood of cities) having its own cultivar. This is only to be expected given the length of time sakura have been cultivated and the special place they have in Japanese culture. It is also fitting that the Berkeley street tree in the photo grows in front of the house of a lovely Japanese woman, my sister-in-law.
Prunus virginiana var. demissawestern chokecherry. Most people find the cherries tart. One source recommends mixing the fruit with apples for a tasty jam. Branches were fashioned into bows by many Native American groups. Birds love the fruit. Photographed at the University of California Botanical Garden.