Hi Mary Sue: Welcome to alphabet soup, taxonomy style. At Chicago Botanic Garden we have chosen to follow the taxonomies cited by ITIS <http://www.itis.gov/>. These taxonomies reflect the recommendations of Flora of North America and the USDA Plants database. Beyond North America, we use a number of references - and as you have discovered they don't always agree with each other. My suggestion would be to identify synonyms (of the families) and provide a link to migrate between them. The important point (in my opinion) is that our users find the plant they are searching for - not in promoting any one of several differing views of taxonomic relationships. Boyce Tankersley Director of Living Plant Documentation Chicago Botanic Garden 1000 Lake Cook Road Glencoe, IL 60022 Tel: 847-835-6841 Fax: 847-835-1635 Email: btankers@chicagobotanic.org