Help me defend my Fragrant Spring Tree!

I bought this a few years ago from Raintree and it has been a nice addition to my urban homestead. I get a lot of visitors touring and try to share Permaculture ideas and food security thoughts with them. I have almost all edible/medicinal/useful plants in my yard and no "ornamentals". Many of the visitors look in horror at the Fragrant Spring Tree and try to convince me it is a Tree of Heaven. considered locally as a deadly invasive. Being far from a botanist, I am left without any way to defend this plant. Could someone point out how these two trees are different so I can ease the minds of my visitors? Thanks!

Get hold of a sprig of Ailanthus, if there is one handy. The two have different smells. The leaflets of Ailanthus, I think, have a little gland at the base, which the Cedrela lacks....

If this is what you have then you have another edible.

http://howtogrowperennialvegetables.com/the-veggies/trees/fragrant-spring-tree/

Or maybe I didn't understand your question?

Alder: Great idea! I don't know where any are right now but I will ask around and try to find one.

Miles: I was probably not clear. I do have a Fragrant Spring Tree. I am often accused of it being a Ailanthus.

As an aside, I had a Chinese woman visit the garden. She recognized the tree right off and was very excited. She harvests (with permission) the tender shoots of my tree and uses them in dumplings which she sells at a local Farmers Market. She had been trying to get one of these trees, or grow one from seed, for years. She was beside herself when I was able to give her one of the "babies" from mine this spring. Made me happy too!