. Fossil plants : for students of botany and geology . Paleobotany. Fig. 245. A. Marattia fraxinea. A'. A single synangium showing the two valves and pores of the sporangial compartments. B, B'. it/. Kaulfussii. C, Kaulfussia (synangium showing pores of sporangial compart- ments). D, B. Marattiopsis Milnsteri. (C, after Hooker; D, E, after Schimper.) composed of two valves, which on ripening come apart and expose two rows of pores formed by the apical dehiscence of the sporangial com- partments (fig. 245, A', B). In Marattia Kaulfussii the sori are attached to the lamina by a short stalk (fig.
. Fossil plants : for students of botany and geology . Paleobotany. Fig. 245. A. Marattia fraxinea. A'. A single synangium showing the two valves and pores of the sporangial compartments. B, B'. it/. Kaulfussii. C, Kaulfussia (synangium showing pores of sporangial compart- ments). D, B. Marattiopsis Milnsteri. (C, after Hooker; D, E, after Schimper.) composed of two valves, which on ripening come apart and expose two rows of pores formed by the apical dehiscence of the sporangial com- partments (fig. 245, A', B). In Marattia Kaulfussii the sori are attached to the lamina by a short stalk (fig. 245, B, B') and the leaf bears a close 1 Hooker and Baker (68) p. 440. 2 The term synangium is applied to sporangia more or less completely united with one another and producing spores in groups separated by walls of sterile cells. A synangium may be regarded as a spore-forming organ produced by partial sterilization of sporogenous tissue or as a group of coalescent 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
