Can anyone ID this flower? Very fragrant, growing on a small tree or tall shrub in MN in late May

This is so beautiful and the fragrance is very pervasive out in an old cow pasture. I think it is wild but could be wrong.

I'm sorry but I can't see the flower in much detail Do you have a close-up of it perhaps?

Here's one of the tree, which isn't doing as well as usual this year - maybe because of our drought - and one closeup of a branch will follow shortly.

Here is a close-up of a branch.

It might be a Black Locust and is related to the purple robe locust.

Thank you so much! Checked out images in Wikipedia and it sure does look like it. It's kind of out of place here in Minnesota but might survive if it survives Pennsylvania. There is a pod in the picture above and if I can find it I may try to get one to grow in a pot.
Thanks again - I've been trying to find out for years!

Black locust - we have 'em by the gazillions here in Zone 3. I have 2 in my yard: both are 30" DBH (diameter @ breast height). They will sprout from nicked roots If you're digging in the general area and are pretty near indestructible. Also make GREAT firewood.

Thank you! I'm in zone 4 (Twin Cities - MN) and a bit amazed to see it here. The fragrance actually competes with lilacs and the flowers are beautiful. Will try to get one. The one here is in the dog park (ex cow pasture)and it seems to have more than a few suckers so I will be out there with a trowel.

Well, the joke is totally on me. I mentioned my query here to my son and he said the dog park is full of those trees, just look up. Was out there this morning and there they were 40 feet above my head, making the entire place smell exotic and tropical. Really had to laugh at myself. Have spent so much time there photographing flowers and grasses and the dog and I never looked up to see the marvelous smelling trees. I grew up in northern MN in sand and pine country and just never knew we had such a wonderful blooming tree in this state.


PS Turns out they are considered an invasive species in Minnesota. Checked the DNR site.