Studies on diversity and evolution of Iridaceae species in southern Brazil

plants of the family iridaceae are well represented in the grassland vegetation of southern brazil, occurring in the pampa and atlantic forest biomes. nevertheless, little is known about the taxonomy and evolution of iridaceae species in southern brazil. the main goal of this review is to compile published information about south american iridaceae, and to discuss the evolution and genetic diversity of the family presenting our own research data in the light of the published literature. the main focus is on the genera calydorea, cypella, herbertia, and sisyrinchium. aspects of reproductive system and of pollinator attraction are also discussed.