This study was conducted between 2012 and 2013 to analyze the biodiversity of woody plants across three oceanic islands (Terceira, Tenerife, and Réunion) with distinct geographical characteristics. The research aimed to investigate patterns of variation in the structure of the vegetative community within the native forests of each island. A standardized methodology was applied across the three islands, focusing on native forests that were little anthropogenic disturbance. Ten plots (50 m × 50 m) were established on each island, within which a 5 m × 5 m square was demarcated (see Borges et al., 2018a). The study generated 30 event records and 402 occurrence records.