This is not a question, but comments and corrections are very welcome. I’m attaching some plum photos, as many people refer to these trees as cherries. They’re Prunus cerasifera, that is, myrobalan (cherry plum), and they are just about the first colour to appear on Vancouver BC city streets. [Edited Feb 21, 2008 - So that's wrong - This year I notice that the Whitcomb cherries are now getting colourful, while the plums have hardly started to bud - wcutler]. They’re on very many of the streets, often alternating with cherry trees. They have small single blossoms, either white or pink, have either bronze or green leaves appearing with the blossoms, are fragrant, usually do not have horizontal striping on their bark, and the flowers hang on solitary stems, not in groups of two or three like cherries. An inquiry about these trees on another forum mentioned how ubiquitous they are and how striking they look with their almost black bark against the light fluffy blossoms.