First record of Croton rottlerifolius Baill. (Euphorbiaceae) in Pernambuco state, Brazil-a warning for the protection of threatened Brejos de Altitude of the Caatinga domain

The occurrence of Croton rottlerifolius Baill. in the state of Pernambuco, Brazil, is recorded here for the first time. Individuals of this species were collected in the municipality of Triunfo in a Brejo de Altitude, a type of humid forest found in some mountain ranges and plateaus of the Brazilian semi-arid region. This new record is essential for a better understanding of the geographical distribution and conservation of C. rottlerifolius in Brazil.