Very nice! Did you start it from seed?

There's several of them that have been coming up by themselves over the past number of years. This is the first flowering that I've noticed. Having bark, leaves, flowers and seed capsules made getting a positive indentification easier. There was probably a mature tree (or trees) here that got cut out before I got the place and seeds have been sprouting opportunistically. The tallest so far are still only very tall saplings, but apparently enough to get some flowering happening. The flowers are strongly perfumed, you can smell them standing well back from the tree.