Hi Lin,
That tree is a Russian Olive. Funny story, I bought it and misread the tag. Thought it was going to be a 26 inch shrub, not 26 feet x 26 feet. It is about 10 years old. I trimmed it to tree-form when it was about 6 feet tall. I blooms in June and the fragrance is strong but beautiful.
Elaeagnus angustifolia
