Palinotaxonomia de espécies Brasileiras de Peritassa Miers (Hippocrateaceae juss.)

Abstract

The palynotaxonomic study of Peritassa Miers aimed to contribute to a better characterization as well as the circumscription and delimitation of this genus. The pollen grains of 10 species of the Peritassa were studied. The pollen grains were acetolyzed, measured, described and illustrated using light microscopy (LM) and scanning eletronic microscopy (SEM). The analysis in SEM was used in order to elucidate the exine sculpture. The data obtained were statistically analysed according to sample sizes. P. calypsoides (Camb.) A.C. Sm. Was the only species studied that showed tetrads. The species with pollen grains in monads are generally of small size, microreticulate (with smooth or undulate muri) or granulate, 3-colporate, with a prominent or not apertural area. Pollinic key is presented using results obtained in light microscopy. Peritassa is euripollinic genus and its palynological characteristics can help in taxonomic studies of this group.