Fig. 7From: Osmunda pulchella sp. nov. from the Jurassic of Sweden—reconciling molecular and fossil evidence in the phylogeny of modern royal ferns (Osmundaceae)Schematic drawings showing diagnostic anatomical characters of Osmunda pulchella sp. nov. from the Lower Jurassic of Skåne, southern Sweden. a Stem cross section. b Successive cross sections of basal (bottom) to distal (top) petiole portions. Xylem in white; parenchyma in light-grey; sclerenchyma in dark-grey; sclerenchyma with particularly thick-walled fibres in black; oc = outer cortex; ic = inner cortex; st = stele; p = pith; xs = stelar xylem segment; lt/ic = leaf trace in inner cortex; lt/oc = leaf trace in outer cortex; rt = root trace; sr = sclerenchyma ring; aa = abaxial arch of thick-walled fibres; sbc = sclerenchyma mass in bundle concavity; spw = sclerenchyma mass in petiole wing; lm = lateral masses of thick-walled fibres; am = abaxial mass of thick-walled fibresBack to article page