Amur cork tree is proving very attractive to bees right now (early July). We grew our specimen from seed we collected in Montreal years ago. Since that time I’ve noticed a specimen at the NSAC (oops, Dal-Agriculture). I just learned that it is considered an invasive species and banned in some of the United States. i also learned it figures big in Chinese medicine and products from it are reputed to have many health benefits. The tree is native to Manchuria, Korean, Northern China and Japan and because of its hardiness is sometimes used as an urban planting in North America.