. Fossil plants : for students of botany and geology . Paleobotany. XXXIIl] COEDAITES 263 of small rootlets is composed of two zones, an outer parenchyma without cell-contents and an inner parenchymatous tissue charac- terised by the occurrence in some of the cells of tangled masses of fungal hyphae almost always unseptate. In some cases the hyphae bear terminal vesicles similar to those observed on fungal hyphae in the cortex of Podocarpus roots. Osborne makes out a good case for regarding the fungus as symbiotically related to the tissues of the lateral roots, a relationship identical with t
. Fossil plants : for students of botany and geology . Paleobotany. XXXIIl] COEDAITES 263 of small rootlets is composed of two zones, an outer parenchyma without cell-contents and an inner parenchymatous tissue charac- terised by the occurrence in some of the cells of tangled masses of fungal hyphae almost always unseptate. In some cases the hyphae bear terminal vesicles similar to those observed on fungal hyphae in the cortex of Podocarpus roots. Osborne makes out a good case for regarding the fungus as symbiotically related to the tissues of the lateral roots, a relationship identical with that in many existing trees, particularly Myrica and Alnus. It is suggested that the formation of the coralline root-tubercles is a feature consistent with the view that Cordaites Uved in saline marshes, a physiologically dry habitat favourable to the occurrence of Fig. 478. Root () exposed in the bed of the Vaal river. (After Mellor and LesKe.) Reference has already been made to the habit of Cordaitean roots in the general account of the genus (figs. 468, A, 478). The specimen shown in fig. 478 may be a root of Cordaites {Noegger- athiopsis) Hislopi, but nothing is known as to its structure^. ' MeUor and Leslie (06) 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
