The horizontal structure of commercial species of the low-hill forest of the Aumento Shiringal Iberia and Nuevo Girardon farms, Tapiche district, Loreto, was determined in 2021. Data from the forest census of commercial species for lumber purposes were evaluated. In the forest of the Aumento Shiringal Iberia farm, 255 trees were registered, comprised in 24 commercial forest species and 16 botanical families; while in the Nuevo Girardon farm, 100 trees were registered, comprised in 8 commercial forest species and six botanical families. The distribution of the number of trees by diameter class of the forest of the Aumento Shiringal Iberia farm is 7,19 trees/ha, while the forest of the Nuevo Girardon farm contains 2,34 trees/ha; in both forests the diameter class of 60 cm to 70 cm contains the highest number of trees. Ecologically, Ciba samauma (Malvaceae) is the most important in the fore...