An updated checklist of the bryophytes of Réunion

The first checklist of bryophytes from Réunion, published in 2005, recorded 621 species for the island. Nearly 20 years later, the total number of bryophyte species reported has increased to 822. This significant growth in knowledge results from ongoing floristic exploration, and ecological studies examining diversity across elevational gradients. We here report 500 species of mosses, 313 species of liverworts, and nine species of hornworts, including 16 moss, 20 liverwort, and three hornwort taxa that are newly recorded for Réunion. Unsurprisingly, endemism levels have decreased with increased knowledge of the local and regional flora. Forty-nine bryophyte species are endemic (6 %), comprising 36 mosses and 13 liverworts. We also indicate taxa described based on type material from either Réunion or the wider Madagascar region, and provide references linking each name to its first published report on the island. Future research on the flora should focus on clarifying the taxonomy of poorly known taxa. Additionally, targeted collecting efforts and inventories will help improve our understanding of species distributions, which is essential for informed conservation planning.