This database is supplementary material of the article "Update of the Brazilian floristic list of Algae and Cyanobacteria" published in the Journal Rodriguésia in 2015 (DOI: 10.1590 / 2175-7860201566408).
### Attention! In this database the genus _Characium_ A.Braun is under _Charophyceae_. However, it should be considered as belonging to _Chlorophyceae_.