Pubdate: Sun, 11 April 1999 Source: Guardian, The (UK) Copyright: Guardian Media Group 1999 Contact: http://www.guardian.co.uk/ Note: Ayahuasca is a S. American hallucinogen now legal in Brazil for certain religious groups AYAHUASCA PATENT Tribes in the Amazon rainforest have appealed against a patent granted in the United States on one of their most sacred plants, ayahuasca. It is believed to be the first time a native group has sought to revoke a plant patent on medicinal and cermonial grounds. - --- MAP posted-by: Jo-D