Plantas medicinais conhecidas na zona urbana de cajueiro da praia, piauí, Nordeste do Brasil

Abstract

Known medicinal plants found in the urban Cajueiro da Praia urban area, Piauí state, Northeast Brazil. The use of medicinal plants for the purposes of treating, curing and preventing diseases is considered one of the oldest forms of humanity’s medical practices. This study aimed to identify the species of medicinal plants used in the Cajueiro da Praia community, Piauí state, the part of the plant used, the method of preparation, their relative importance, the use value and the consensus on the therapeutic properties of the species mentioned. 12 semi-structured interviews with indicated local experts were performed, using the "snow-ball" sampling method and the "guided tour" technique to collect the aforementioned species by a standardized method. Quantitative analyzes such as Use value, relative importance and informant consensus factor were performed alongside qualitative analyzes. 43 species belonging to 24 botanical families were cited, Lamiaceae being the most represented in number of species (eight species) followed by Euphorbiaceae, Fabaceae, Myrtaceae and Rutaceae (with three each). Chenopodium ambrosioides L. (mastruz) had the highest use value (UV = 1.58), and therefore was the plant with the highest potential for use by the community. For therapeutic use, it was observed that a greater number of species have been shown to combat influenza, followed by maldigestion. The RI showed that the most versatile plant was Chenopodium ambrosioides L. (mastruz) with RI = 2, found in five usage categories and the ICF pointed out that the bodily systems that have greater local importance are: the circulatory system (ICF = 0.57), followed by lesions and consequences by external causes (ICF = 0.50), the endocrine (ICF = 0.50), and the respiratory system (ICF = 0.40). Within the general framework, it was found that the diversity of known medicinal plants and plants obtained from the population studied, suggested a correlation between the use/knowledge of medicinal plants and the availability there of; the medicinal flora is largely represented by exotic plants that are grown in backyards andby the transmission of traditional knowledge made locally and orally demonstrates a cultural heritage in the city.