This collection is made up of specimens with transversal cuts of the stem (Figure 1). Currently it has 62 specimens grouped in 43 species of 13 families of vascular plants.

It represents the most frequent species in the Amazon forests; the families with the greatest number of species in this collection are Bignoniaceae (9), Fabaceae (8), Hippocrateaceae and Menispermaceae (5), Gnetaceae and Caesalpiniaceae (3). Due to the difficulty of collecting the leaves, flowers and fruits, many of which are only found in the canopy of the forest; this collection facilitates the identification of the species through their anatomical characteristics.