The trees, vines, and stranglers ≥10 cm in diameter in 1 ha of terra firme forest in Amazonas State, Brazil, were measured and identified. The plot contained 645 trees representing 201 species, 95 genera, and 34 families (basal area ca 31 m2); 16 vines representing 14 species, 13 genera, and 8 families; and 1 strangler. The dominant families of trees present were the Leguminosae (sensu latu), Lecythidaceae, Sapotaceae, Burseraceae, and Moraceae; the dominant species were Clathrotropis macrocarpa (Leguminosae),Eschweilera coriacea (Lecythidaceae), and Protium hebetatum (Burseraceae). In terms of structure, diversity, and floristic composition, this plot is reasonably typical of the terra firme forests in the central Amazon, as far as this diverse biota can be typified.