The aim of the present work was to evaluate the regeneration of Gilbertiodendron dewevrei in the Botanical garden of the Faculty of Science, University of Kisangani/DR Congo. 1.439 individuals were listed and gathered in various classes of size, diameter of stem and distribution around the carrying foot. 33 years after the establishment of this botanical garden, Gilbertiodendron dewevrei was transformed into a forest species. Indeed, it found ecological conditions similar to those of its medium of origin and which favor its optimal ex situ development. The individuals having the size ≤ 50 cm, are the most represented with 1055 individuals (73,3%) and numbers it individuals having a diameter ≤ 10 cm are higher with 1358 individuals (94,3%). The data on the carrying foot showed a good regeneration of the species. The number of individuals falls when classes progress in the ascending order. It is thus desirable that studies are regularly carried out on the species headlights of the botanical garden for a permanent follow-up of the evolution of their florula.

An ecological study based on the natural regeneration of the undergrowth was carried out in the S. Lisowski botanical garden of the Faculty of Science, Kisangani University. A floristic inventory was conducted taking into account the height and diameter of all individuals. From this inventory, 3901 individuals have been recorded and grouped into 6 species, 6 genera, and 5 families; for the species assessed according to the scale of abundance – dominance of BRAUN BLANQUET, 8 species grouped into 8 genre and 7 families were counted. The obtained result show the dominance of the Leptonychia tokana (1232 feet or 31.58%) species, followed by Costus lucanusianus (881 individuals or 22.58%) and finally Tricalysia bequaertii (741 feet or 18, 29%). Among the Spectra evaluated according to the scale of abundance-dominance of BRAUN BLANQUET, Trachyphrynium braunianum and Anthurium ferrierense are the most abundant. The most represented families in the undergrowth of the garden are the Rubiaceae, Marantaceae, Malvaceae and Costaceae.