Convolvulaceae in Dense Ombrophilous Forest remnants in Rio de Janeiro, Brazil

Abstract

The present study had the goal of carrying out a floristic inventory and taxonomic treatment of Convolvulaceae in three Dense Ombrophilous Forest remnants in the State of Rio de Janeiro: Itatiaia National Park (Parque Nacional do Itatiaia-PNI), Serra dos Órgãos National Park (Parque Nacional da Serra dos Órgãos-Parnaso), Poço das Antas Biological Reserve (Reserva Biológica de Poço das Antas-Rebio). Herbaria were consulted, scientific expeditions to the study area were carried out and the taxonomy of collected species was identified. The results were able to cover the identification of species, diagnoses, commentary, illustrations, and habitat. The survey found five genera, 33 species and one variety. Five species are endemic to the Brazilian Atlantic Rainforest. The number and types of stigma, leaf lamina, fruit and indumentum were the main characteristics identified for the studied taxa. Among the studied species, 90% are herbaceous and 31 (86%) have a voluble habit, the majority resulting in individuals with a low circumference (1-10 cm). The greatest variety of species was observed for Parnaso (23), followed by PNI (15) and finally by Rebio (11). The montane Forest showed greater formation of taxa, with the occurrence of 12 species.

Key words:
Atlantic Rainforest; floristic composition; vines; taxonomy; conservation