Abstract
Palynological studies provide valuable data for taxonomy, particularly in supporting species delimitation. The genus Stachytarpheta includes a smaller group of seven species with pedicellate flowers and salmon- or wine-colored corollas, which are restricted to the Brazilian Cerrado. Despite representatives of this group, known as the S. longispicata group, being readily distinguished from other Stachytarpheta taxa for bearing sessile flowers, differentiating the seven species remains challenging due to their pronounced morphological overlap. In this context, we analyze the pollen morphology of the seven species in the S. longispicata group, aiming to evaluate its relevance to current taxonomic circumscription. Palynological characterization was based on observations under light microscopy and scanning electron microscopy using pollen material from herbarium specimens of the seven species.
Keywords:
Palynology; Species complex; Stachytarpheta; Taxonomy; Verbenaceae
Full Article: https://www.scielo.br/j/abb/a/6WCQZZZKdv8FPJhcLCPTy9D/?format=html&lang=en