This is not a question, but comments and corrections are very welcome. The Avium â€˜Plenaâ€™ is a double flowered version of the mazzard or sweet cherry, though it is an ornamental and does not produce cherries. The dense white blossoms appear at the same time as the green or bronze-green leaves. This can be quite a large tree. Photos were taken April 19 on Highbury St in Vancouver.