The American Herbal Pharmacopoeia http://www.herbal-ahp.org/ Bastyr University http://www.bastyr.edu Dr. Duke's Phytochemical and Ethnobotanical Databases http://www.ars-grin.gov/duke/plants.html Provides chemical consituents and actions of hundreds of medicinal plants (with references) Michael Moore's Southwestern School of Botanic Medicine http://sunsite.sut.ac.jp/pub/academic/medicine/alternative-healthcare/herbal -medicine/SWSBM/HOMEPAGE/HomePage.html The Herb Research Foundation http://www.hrf.org/ American Botanical Council http://www.herbalgram.org/