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Quararibea bragae from the Atlantic Forest of Espírito Santo State (Brazil) is proposed as a new species. Quararibea bragae is similar to Q. turbinata in vegetative characteristics, such as the shape and consistency of its leaves and type of domatia. However, it can be distinguished by the leaves’ indumentum and by the positioning and quantity of domatia on the abaxial surface of the leaves. Reproductive characteristics are differentiated by the shape and indumentum of the staminal tube and the shape of the fruit. We present a morphological description and comments, illustration, notes on ecology and distribution, and identification key of Atlantic Forest species.

We describe Quararibea alversonii, a new species endemic to the Atlantic Forest of southern Bahia, which was found in the course of our review of Quararibea in Brazil. The new taxon is similar to Q. amazonica, mainly in calyx morphology, but it is distinguished by the presence of domatia, pedicel length, petal width, morphology of staminal columns and styles, as well as fruit shape. Here, we present a morphological description, taxonomic comments, photographs, distribution map, assessment of conservation status, and a comparative analysis between the new species and Q. amazonica, the only other member of the genus that also presents a costate calyx.

A new combination and a new status, Pachira manausensis, is here proposed. After making field observations and analyzing type and herbarium specimens, we realized that P. aquatica var. manausensis should be treated as a species due to many morphological and distribution differences compared to the typical variety. We provide detailed descriptions and a distribution map, table, key, and plate to distinguish both species using morphological characteristics. Typifications and nomenclatural notes for related names were performed.

In the present study, I propose a new species, Quararibea bovinii, an Atlantic Forest tree. The new taxon occurs in southeastern Brazil, in the states of Espírito Santo, Rio de Janeiro, and São Paulo. It resembles Q. similis in terms of floral morphology and fruit shape, but it is distinguished by the indumenta of leaves, leaf width, and seed shape.