. Fossil plants : for students of botany and geology . Paleobotany. 468 COENOPTERIDEAE [CH. The sporangia^ o{ Stauropteris oldhamia are exannulate and nearly spherical, with a wall of more than a single row of cells; they occur at the tips of slender and doubtless pendulous branchlets. The discovery by Scott ^ of germinating spores (fig. 323) in a sporangium of this type supplies an interesting piece of evidence in favour of the fern nature of these repro- ductive organs. Similar germinating spores have been described by Boodle^ in sporangia of Fig. 322. Sporangia of Stauropteris oldha
. Fossil plants : for students of botany and geology . Paleobotany. 468 COENOPTERIDEAE [CH. The sporangia^ o{ Stauropteris oldhamia are exannulate and nearly spherical, with a wall of more than a single row of cells; they occur at the tips of slender and doubtless pendulous branchlets. The discovery by Scott ^ of germinating spores (fig. 323) in a sporangium of this type supplies an interesting piece of evidence in favour of the fern nature of these repro- ductive organs. Similar germinating spores have been described by Boodle^ in sporangia of Fig. 322. Sporangia of Stauropteris oldhamia. St, stomium : p, palisade tissue. (From Tansley, after D. H. Scott, from a drawing by Mrs D. H. Scott.) Stauropteris burntislandica. This Lower Carboniferous plant identified by Williamson with the Oldham plant from the Lower Coal-Measures is referred by Bertrand to a distinct species. In the structure of the rachis stele it agrees closely with Stauropteris oldhamia; the main vascular strand gives off four rows of branches, two from each side, and aphlebiae were present at the common 1 Scott (04); (05'). 2 Scott (06^). 3 Boodle (08).. 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
