Miranda, M.D., Külkamp, J. and Oliveira, L.D.S.D.D. 2026. A newly discovered species of Actinostemon (Euphorbiaceae) critically threatened from the Coastal Atlantic Forest of São Paulo State, Brazil. Phytotaxa. 773, 3 (Sep. 2026), 281–288. DOI:https://doi.org/10.11646/phytotaxa.773.3.6.