found: Work cat.: Symposium on the Biology, Ecology, and Management of Garlic Mustard (Alliaria petiolata) and European Buckthorn (Rhamnus cathartica) (2005? : University of Minnesota). Proceedings, 2005.
found: ITIS, Oct. 13, 2007(Rhamnus cathartica -- accepted -- carolina buckthorn, common buckthorn, European buckthorn, European waythorn, Hart's thorn; also Frangula caroliniana -- accepted -- Carolina buckthorn)
found: NatureServe explorer, Oct. 13, 2007(Rhamnus cathartica, Buckthorn. Other English Common Names: Common Buckthorn)
found: Plants database, via WWW, Oct. 13, 2007(Rhamnus cathartica, common buckthorn; also Frangula caroliniana, Carolina buckthorn)
found: A synonymized checklist of the vascular flora of the United States, Puerto Rico, and the Virgin Islands, via WWW, Oct. 13, 2007(Rhamnus cathartica - European buckthorn)
found: GRIN taxonomy for plants, via WWW, Oct. 13, 2007(Rhamnus cathartica. Common names: buckthorn, common buckthorn, European buckthorn)
