. Fossil plants : for students of botany and geology . Paleobotany. XXVIl] GLOSSOPTERIS 501 sporangia, whether they contained microspores or whether they are the spore-capsules of a homosporous plant. The rhizome of Glossopteris Browniana has been described in detail by Zeiller, who first demonstrated that the fossils originally assigned by Royle^ to the genus Vertebraria represent the stem of this and, as we now know, of some other species of Glossopteris. Vertebraria occurs in abundance in Permo-Car- boniferous strata in association with Glossopteris; the differences between Australian, Indi
. Fossil plants : for students of botany and geology . Paleobotany. XXVIl] GLOSSOPTERIS 501 sporangia, whether they contained microspores or whether they are the spore-capsules of a homosporous plant. The rhizome of Glossopteris Browniana has been described in detail by Zeiller, who first demonstrated that the fossils originally assigned by Royle^ to the genus Vertebraria represent the stem of this and, as we now know, of some other species of Glossopteris. Vertebraria occurs in abundance in Permo-Car- boniferous strata in association with Glossopteris; the differences between Australian, Indian, and South forms, though expressed. Pig. 336. Glossopteris Browniana, Brongn. Sporangia. (x 30). After Arber. by specific names, are insignificant. The stems are usually pre- served in the form of flattened, single or branched, axes sometimes bearing slender branched roots and characterised by one or two, or less frequently three, longitudinal grooves or ridges (fig. 337) from which lateral grooves or ridges are given off at right angles, dividing the surface into more or less rectangular areas 1 cm. or more in length. The surface of these areas is often slightly convex and in some specimens the outlines of cells may be detected. Mr Oldham has described some interesting examples ' Royle (33).. 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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