English: From source: FIGURE 1. Stem and leaf fossils of Pleuromeia sternbergii. Scale bars are 10 cm in (A), and 1 cm in (B–H). (A): Typical sandstone cast of a stem segment with the position of leaf traces preserved as depressions. (B,C): Compression fossil (part and counterpart) of the lowest portion of a strobilus with obovate sporophylls. (D): Sandstone cast of rhizomorph and stem revealing rare external leaf scar features. Visible as double vertical lines in each leaf scar are pairs of sclerenchymatous lamellae that accompany the vascular bundle inside the cortex. The white square highlights the part of the stem shown in (E,F). (E): Polymer cast of the same individual as in (D) but based on its fossil counterpart; PA is parichnos/aerenchyma, LC is leaf cushion. (F): Shape of the leaf base, as revealed by the leaf scars in (E); the position of the vascular bundle and accompanying sclerenchymatous lamellae (VB; visible in the specimen in (D)) is shown as overlay. (G): Leaf compression fossil with a clear rhomboid abscission surface. (H): Leaf fragment in which the position of collapsed air channels is visible as vertical furrows on either side of the leaf axis. See Material and Methods for museum specimen numbers.