2

Functional composition of the Amazonian tree flora and forests

Plants cope with the environment by displaying large phenotypic variation. Two spectra of global plant form and function have been identified: a size spectrum from small to tall species with increasing stem tissue density, leaf size, and seed mass; a …

Testing the morphotype-based classification of two leaf shapes in Ecclinusa guianensis (Sapotaceae) from Central Amazonia

*Ecclinusa guianensis* (Sapotaceae, Chrysophylloideae) is a morpho-ecologically variable species and the second most widespread species of *Ecclinusa* in the Amazon basin. In Central Amazonia, two distinct leaf morphotypes can be field-recognized …

Natural history of the hyperdominant tree, Pentaclethra macroloba (Willd.) Kuntze, in the Amazon River estuary

_Pentaclethra macroloba_ is a hyperdominant species with multiple uses in the Amazon. This species tolerates varying flood amplitudes, however the effect of flood topographic gradient on its ecophysiology remains unclear. We want to know if …

The biogeography of the Amazonian tree flora

We describe the geographical variation in tree species composition across Amazonian forests and show how environmental conditions are associated with species turnover. Our analyses are based on 2023 forest inventory plots (1 ha) that provide …

Filling a distribution gap: a new record of Pradosia ptychandra (Sapotaceae) from eastern Brazilian Amazonia

Based on fertile material collected in January 2019, we report the first record of *Pradosia ptychandra* (Sapotaceae, Chrysophylloideae) to the flora of Amapá state, eastern Brazilian Amazonia. This new record fills a geographical gap between its …

Notes on morphology of fruits, seeds, and seedlings of Chromolucuma flavilatex (Sapotaceae) from central Amazonia

This paper aims to describe and illustrate the fruits, seeds, and seedlings of *Chromolucuma flavilatex* (Chrysophylloideae, Sapotaceae) from central Amazonia and briefly discusses their taxonomic relevance. The observed characters can support our …

Lucuma kossmanniae, a new name for Pouteria kossmanniae (Sapotaceae, Chrysophylloideae)

In light of the recent findings in Neotropical Chrysophylloideae (Sapotaceae), it can be understood that *Pouteria kossmanniae* is a member of *Lucuma*, not *Pouteria*, which is why we performed a new combination and increased the number of …

Notes on the seedling morphology of Pouteria franciscana Baehni (Sapotaceae)

Seedling morphology studies have contributed to provide useful data in delimiting different levels of taxonomic groups over the past several decades. Thus, the purpose of this note is to describe on the seedling morphology of *Pouteria franciscana* …

Population structure and small-scale spatial pattern of Mora paraensis (Fabaceae) in a várzea forest in the Amazonian estuary

Detailed knowledge about structural attributes and spatial patterns of tree species is fundamental to enable sustainable management of forest resources. However, this knowledge remains poorly understood in the context of eastern Amazonian floodplain …

Chromolocuma brevipedicellata (Sapotaceae, Chrysophylloideae), a new tree species from central Amazonia, Brazil

A new species from central Amazonia, *Chromolucuma brevipedicellata* (Sapotaceae, Chrysophylloideae) is described and illustrated. It occurs in terra firme (non-flooded) forests near Manaus, Brazil. We compare *C. brevipedicellata* to similar species …