. Fossil plants : for students of botany and geology . Paleobotany. Flo. 194. Sigillaria McMurtriei Kidst. From a specimen from tbe Upper Coal- Measnres of Eadstock, in the British Museum (V. 952). Nat. size. 195, the leaves in vertical series were separated from one another by longer portions of the ribs. As in Lepidodendron the cushions are frequently characterised by irregular transverse wrinklings and other^ surface-ornamentation which in some instances at. Fig. 195. Sigillaria mammillaris. (Khytidolepis form.) From a specimen in the Manchester Museum. ^, parichnos; I, ligule-pit; t, loaf-
. Fossil plants : for students of botany and geology . Paleobotany. Flo. 194. Sigillaria McMurtriei Kidst. From a specimen from tbe Upper Coal- Measnres of Eadstock, in the British Museum (V. 952). Nat. size. 195, the leaves in vertical series were separated from one another by longer portions of the ribs. As in Lepidodendron the cushions are frequently characterised by irregular transverse wrinklings and other^ surface-ornamentation which in some instances at. Fig. 195. Sigillaria mammillaris. (Khytidolepis form.) From a specimen in the Manchester Museum. ^, parichnos; I, ligule-pit; t, loaf-trace; c, cushion ; s, leaf-scar. least may have been produced as the result of post-mortem shrinkage of superficial tissue. From the rarity of shoots with the foliage attached, it would seem that the leaves persisted for a comparatively short time and were cut off by an absciss-layer leaving behind a well-marked leaf-scar area. The linear leaves, ' For an account of the various external features made use of in the classi- fication of Sigillarias, see Koebne (0-1).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Seward, A. C. (Albert Charles), 1863-1941. Cambridge : University Press
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishercambr, bookyear1898
