seconding my dear friend WW, here, Milum, there ain't no such thing as sweet scented ailanthus blossum.. the flowers smell very much like burnt starch.. (skilled cooks might not know this smell) Any one who has ever managed to leave potatoes or rice, or wheat cereal over a flame.. and had it burn, knows the smell.. its not quite as bad as burning rubber, but its pretty bad.

ill-scented greenish flowers is a pretty mild description.

and while the chinese do value them, they are considered weed trees in most parts of the US and about as welcome as kudzu.