The quality of several species of medicinal plants commercialized as "herbal medicinal teas" were analised, using simplified farmacognostic tecniques that could be performace by small laboratories and pharmacies. Results obtained pinted out that no sample analised, presented instructions or informations or cited precautions; 18, 36% of the samples were not registered at the Health Mistery; 25,53% did not inform the scientific name of the plant. 79,16% of the species analised were not appropriate for use.