La identidad de Vernonia Setososquamosa (Asteraceae, Vernonieae): evidencias cromosómicas y palinológicas

vernonia setososquamosa (asteraceae, vernonieae) has been considered by several authors as a synonym of v. remotiflora, as a variety of this taxon or a quite different, independent species. we analyzed chromosome and pollen morphology of both entities looking for information to clarify the status of v. setososquamosa. the latter taxon showed a somatic chromosome number of 2n=2x=30 with the karyotype composed of 22m + 6sm + 2st, while on the other hand v. remotiflora presented 2n=2x=28 and a karyotype formula having 22m + 4sm + 2st. the pollen of both entities was tricolporate, echinolophate, with lacunae disposed in a regular pattern; however, v. setososquamosa presented polar lacunae, whereas v. remotiflora did not. the results support the treatment of v. setososquamosa and v. remotiflora as different species.