sentence: The second group ( Fig 8E and 8F ) unites the representatives with dry fruits and a pericarp differentiated into several topographic zones ( outer epiderm , underlying parenchymatous layers , thick sclerenchymatous sheath , inner parenchyma of one to three cell layers ) , and a thin seed coat with no important differences in the thickness of the layers ( Petiveria , Seguieria , Gallesia ) .