A taxonomic account of Myrcia (Myrtaceae) at the sites of the Biological Dynamics of Forest Fragments Project, Amazonas, Brazil

Abstract

Myrcia is the sole genus of the Myrciinae, one of the nine subtribes of Myrteae (Myrtaceae). The Amazon forest holds about one-quarter of the Brazilian species of Myrcia, but the genus is still understudied in this whole region. In this context, this study presents a floristic survey of Myrcia in the permanent plots of the Biological Dynamics of Forest Fragments Project (BDFFP), in Amazonas state, Brazil. The genus is represented by 36 species in the study area, comprehending 32% of its total richness in the Brazilian Amazon forest, with 19 of them endemic to this domain. Myrcia neospeciosa is reported as a new occurrence for Amazonas state and M. grandis is recorded for the first time from upland terra firme forests on clayish soils. Myrcia cuspidata, a species with calyptrate flowers, is classified under Myrcia sect. Aulomyrcia, representing the second taxon of the genus with this feature removed from Myrcia sect. Calyptranthes. Finally, morphological aspects of the infra-generic categories of Myrcia are reported more overlapping than previously thought. A map containing the location of the study area, an identification key, descriptions, comments, and figures are provided.

Composição florística de diferentes fitofisionomias do Ceará e do Piauí

“…Outros estudos também encontraram que esses gêneros como os mais representativos da família Myrtaceae (Bizarro et al, 2021;Santos et al, 2021). No caso do gênero Myrcia, ele engloba arbustos e árvores com até 30 m de altura e possui várias propriedades farmacológicas identificadas, com destaque para antioxidante, inibidor enzimático e antimicrobiano (Gaem et al, 2021;Ribeiro et al, 2022). Já o gênero Eugenia, ele possui um maior número de estudos, espécies e potencialidades bioativas e medicinais, entre elas atividades, antioxidante, antibacteriana, antifúngica e antiinflamatória (Ribeiro et al, 2022).…”