Rediscovery and sectional placement of Croton ichthygaster (Euphorbiaceae), a rare species from Southern Brazil

Croton ichthygaster is a rare shrubby species from the states of Paraná and Santa Catarina in southern Brazil. We collected new specimens from a recently found population in Santa Catarina. This allowed us to record previously unknown morphological characters for the species and infer its sectional placement in the current Croton classification, namely sect. Adenophylli. We provide an emended description of C. ichthygaster and a key to distinguish it from morphologically similar Croton species occurring in its geographic range