I saw a very special and beautiful tree yesterday in Tel Aviv. It's very tall, the color of its trunk and branches is light gray, most of the branches emerege of the trunk in groups of 4 branches with an angle of 90 degrees between each branch and the trunk and each branch and the next branches (it's almost geometric, really). It had red flowers.
I'd like to know the name of this tree, I hope my description is accurate enough.