Seeking name - Murraya plant type

I have a lovely smelling plant in my backyard and I seek help with identification. I believe it is a type of Orange Jasmine or Jessamine. That would make it some type of Murraya but here is the problem. I don't get berries and after looking at thousands of photos of flowers, mine seem quite different. All the local garden people could tell me is that it is quite a rare plant. Ah...

Please note the size of the flowers and the height of the centers. Notice the amount of pollen on the leaves. Thick green leaves and large clusters of flowers. Oh, it smells heavenly and I wish I could capture the scent. It blooms once a year in NM, usually the beginning of June. I would love to know how to propagate it too. But first, a name. I seek the type of Murraya, so if you know, please jump in here.