. Fossil plants : for students of botany and geology . Paleobotany. 442 COENOPTERIDEAE [CH. Botryopteris antiqua, Kidst. Fig. 307. This species, recently described by Kidston^ from the Culm of Pettycur near Burntisland, is represented by sections of a small stem with a cylindrical stele 0"40 mm. in diameter com- posed entirely of scalariform tracheae without any recognisable protoxylem. The petioles are larger than the stem; the meristele (fig. 307) is oval with protoxylem elements on the slightly more rounded adaxial face. As Kidston suggests, this. Fig. .307. Botryopteris antiqua: Petio
. Fossil plants : for students of botany and geology . Paleobotany. 442 COENOPTERIDEAE [CH. Botryopteris antiqua, Kidst. Fig. 307. This species, recently described by Kidston^ from the Culm of Pettycur near Burntisland, is represented by sections of a small stem with a cylindrical stele 0"40 mm. in diameter com- posed entirely of scalariform tracheae without any recognisable protoxylem. The petioles are larger than the stem; the meristele (fig. 307) is oval with protoxylem elements on the slightly more rounded adaxial face. As Kidston suggests, this. Fig. .307. Botryopteris antiqua: Petiolar vascular strand. (After Kidston: x 65.) stem may belong to a scrambling plant which required support to bear its relatively large leaves. An interesting feature is the absence of projecting teeth in the leaf-trace, a character in marked contrast to the ea form assumed by the petioles of Botryopteris forensic (fig. 319, G) and B. hirsuta. This leads Kidston to suggest that the vascular strand of the petiole tends "to become more traced back in geological ; The greater similarity in this species between the stele 1 Kidston (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
Size: 1497px × 1668px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpublishercambr, bookyear1898
