. Fossil plants : for students of botany and geology . Paleobotany. 500 PTERIDOSPERMS, ETC. [CH. the meshes are usually hexagonal and arranged as shown in figs. A and B, but occasionally (fig. 335, C) they follow a more steeply inclined course. Small leaves with a more or less distinct midrib, 2—3 cm. in length, supply transitional stages between foliage- and scale- leaves. In the true scale-leaves spreading and occasionally anastomosing veins take the place of the midrib and lateral veins of the ordinary frond. McCoy ^ in describing some Australian specimens of Olossopteris in 1847 spoke of s
. Fossil plants : for students of botany and geology . Paleobotany. 500 PTERIDOSPERMS, ETC. [CH. the meshes are usually hexagonal and arranged as shown in figs. A and B, but occasionally (fig. 335, C) they follow a more steeply inclined course. Small leaves with a more or less distinct midrib, 2—3 cm. in length, supply transitional stages between foliage- and scale- leaves. In the true scale-leaves spreading and occasionally anastomosing veins take the place of the midrib and lateral veins of the ordinary frond. McCoy ^ in describing some Australian specimens of Olossopteris in 1847 spoke of scale-like appendages of the rhizome which he compared with the large ramenta of Acrostichum and other ferns. It was, however, Zeiller ^. 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
