Ethnobotanical study of twenty species in the family Asteraceae in Ile-Ife, Osun State, Nigeria

Abstract

Ethnobotanical study was conducted on 20 plants belonging to 18 genera of the Asteraceae family. The aims of this research were to explore the current ethnobotanical status of the identified plant species, document their indigenous utilization for diverse purposes within the specific research area and assess the extent of Asteraceae plant usage by the local population. Data were collected through semi-structured questionnaires and open-ended interview techniques with different categories of informants in the Ife Central Local Government Area of IleIfe, Osun State, Nigeria. Demographic data of respondents were analyzed using a descriptive statistical method, providing understandings into their characteristics. The ethnobotanical survey results were subjected to quantitative analysis employing several parameters. The Relative Frequency of Citation (RFC) was utilized to determine the prominence of plant species in terms of citations. The Use Value (UV), Fidelity Level (FL), and Informant Consensus Factor (ICF) were employed to assess plant importance, therapeutic efficacy, and consensus among informants, respectively. Ethnobotanical study of the selected Asteraceae plants revealed the traditional uses of these plants for diverse purposes for both humans and livestock. The average ICF value was 0.92, indicating a relatively high consensus among the respondents. Ageratum conyzoides, Tithonia diversifolia, Aspilia africana, Launaea taraxacifolia and Tridax procumbens were the most cited of all the species, hence their high RFC values. Fidelity Level (FL) had the highest value in Aspilia africana, Tithonia diversifolia and Ageratum conyzoides while Acmella radicans had the lowest FL value. According to this study, Ageratum conyzoides (0.10) and Launaea taraxacifolia (0.10) had the highest use value. The study concluded that the Asteraceae species have several edible, ornamental and medicinal uses, which have not been explored extensively in the study area.