Medicinal Plants: versatility and concordance of use in the caatinga area, Northeastern Brazil.

This study aims to investigate the diversity of native medicinal plants in a caatinga area, verifying the versatility of species and concordance of use among the informants, in the Angico de Cima community, in the city of Aurora, Ceará, Brazil. Ethnobotanical data were obtained through semi-structured interviews with key informants, adopting the snowball technique. The Relative Importance (RI) and Consensus Factor among Informants (ICF) were analyzed to indicate the most versatile species with the highest agreement of use, respectively. Within the 35 registered native species, eight presented great versatility, with a RI> 1, standing out Ziziphus joazeiro Mart. (1.86) and Heliotropium indicum (L.) Lehm (1.67). The 60 therapeutic indications were grouped into 13 body systems categories, of which Genitourinary System Disorder and Nervous, had the highest agreement of use with ICF from 0.8, each. Some species, such as Heliotropium indicum, have a high RI, are scarcely indicated for therapeutic activities in caatinga and require studies that prove their medicinal properties.