Fig. 7.

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 fibres