Summary
Phytosociologlc survey of "lowland-forest" in the Estação Experimental de Silvicultura Tropical-INPA (Tropical Silviculture Experiment Station of INPA), Manaus, Amazonas, Brazil. The data obtained were classified according to Muller-Dombois and Ellenberg (1974), and a single vegetation unit was recognized for the community studied. Information on the vegetation structure resulting from comparative graphic analysis of height and diameter of the trees are also presented.