Estudo florístico-taxonômico das Asteraceae ocorrentes na localidade Fazenda Velha - Valença do Piauí - e suas contribuições para o ensino de botânica

Abstract

The present work addresses the floristic-taxonomic study of the Asteraceae family in the locality Fazenda Velha, located in Valença do Piauí, occurring in the months of June and August 2021, March 2022 and March and May 2023. The family has a wide diversity, being characteristic for its chapter-type flowers, its dried fruit called cypsela and its modified calyx, known as papus, is characteristic of open, mountainous areas and with lower incidence in forest areas. The family is considered cosmopolitan, however, it is characteristic of tropical, subtropical and temperate regions, and can be found in open areas, the same, has great economic importance, being used in industry, besides presenting medicinal use. The research took place through the walking method, where at each visit, fertile individuals and up to five whole specimens were collected. From the floristic survey, it was possible to evidence six taxa and four tribes through the identification and description of morphological data, the study gathers records of the taxa that make up photographic boards. It is presented the identification key of the species and the didactic guide of plant morphology of the species Tridax procumbens L, in order to corroborate with the teaching of botany through precepts of morphology that arouse the curiosity and appreciation of the regional flora.