Isoëtes are iconic but understudied wetland plants, despite having suffered severe losses globally mainly because of alterations in their habitats. We therefore provide the first global, comprehensive data set of aquatic Isoëtes and their habitats. We compiled a global database that includes all known environmental data collected from 1935 to 2023 regarding aquatic Isoëtes. This resulted in 2,179 records. The environmental data taken at Isoëtes' sampling stations varied but may include measures of water quality, water depth, and substrate composition.

The data were compiled to provide the first global ecological assessment of aquatic Isoëtes to identify their environmental requirements and to evaluate if taxonomically related species differ in their ecology (as reported in Azzella et al. 2024). The intent of this data set is to associate environmental drivers to several Isoëtes species found around the world. We encourage the data to be used for new scientific and conservation purposes and request that users contact the authors who uploaded the data for collaborations.

Peer reviewed