Ferreira, Paula Iaschitzki creator Gomes, Juliano Pereira creator Stedille, Lilian Iara Bet creator Bortoluzzi, Roseli Lopes da Costa creator Mantovani, Adelar creator text periodical abstract or summary bl. continuing eng ABSTRACT Pioneer species have the potential to colonize disturbed environments, contributing to the establishment of other species and driving the dynamics and advancement of the structure of forest communities. The aim of this study was to assess the evolution of floristic-structural composition in the regenerating stratum of communities formed in the Mimosa scabrella Benth. understory with different ages. The study was carried out in four municipalities located in the Santa Catarina State South Plateau, on communities with different successional ages. The plot method was applied to the survey of all arboreal individuals with height ≥ 10 cm. The floristic-structural patterns found were compatible with the expected trend of Araucaria Forest successional dynamic, showing higher richness and abundance of regenerating individuals in the older understories. Keywords: bracatinga, forest succession, natural regeneration, facilitation, Araucaria Forest. Publicação on-line; 26 ref.; 3 tables; 2 illus.; Summary (En) MIMOSA SCABRELLA BRACATINGA REGENERAÇÃO NATURAL FLORESTA ARAUCÁRIA Rio de Janeiro-RJ Instituto de Florestas - UFRRJ 1994 2025-0452 1415-0980 / ISSN 2179-8087 0nline BR2026001250 v. 26(4) p. 1-11; (2019) https://www.scielo.br/j/floram/a/zPX6Fx5qdCjPH9KNRqCfKHL/?format=pdf&lang=en https://www.scielo.br/j/floram/a/zPX6Fx5qdCjPH9KNRqCfKHL/?format=pdf&lang=en BR-BrBNA 260422 20260422164946.0 eng