. Studies in fossil botany . Paleobotany. 374 STUDIES IN FOSSIL BOTANY by Brongniart as long ago as 18291 (see restoration, in Frontispiece). It was suspected by Williamson, from the time of. Fig. i^S.—Lyginodendron oldhamium. Radial section of stem, passing through the base of a petiole, .v~, wood of >,tem, enclosing pith ; pc, pericyck-; c, outer cortex ; pet, petiole ; the vascular bundle extends from the petiole down into the pericycle of the stem ; f, cortical spines. X 3^. Will, Coll. 1982. (G. T. G.) his first observations on the petioles of these leaves, 1 The identity of the Lygino
. Studies in fossil botany . Paleobotany. 374 STUDIES IN FOSSIL BOTANY by Brongniart as long ago as 18291 (see restoration, in Frontispiece). It was suspected by Williamson, from the time of. Fig. i^S.—Lyginodendron oldhamium. Radial section of stem, passing through the base of a petiole, .v~, wood of >,tem, enclosing pith ; pc, pericyck-; c, outer cortex ; pet, petiole ; the vascular bundle extends from the petiole down into the pericycle of the stem ; f, cortical spines. X 3^. Will, Coll. 1982. (G. T. G.) his first observations on the petioles of these leaves, 1 The identity of the Lyginodcndroii foliage with this species of Sphenopteris has recently been demonstrated in detail by Mr. Kidston in his paper on the microsporangia of Pteridospermeae, cited 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 Scott, Dukinfield Henry, 1854-1934. London, A. and C. Black
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