. Fossil plants : for students of botany and geology . Paleobotany. XXXII] ERISTOPHYTON 199 Eristofhyton Beinertianum (Goeppert). 1850. Araucarites BeineHianus Goeppert, Mon. Foss. Conif. p. 233, Pk. 42, 43. 1872. Arancarioxylon Beinertianum Kraus, in Schimper's Trait. Pal. Vol. ii. p. 381. 1888. Araucarites Beinertianus Goeppert and Stenzel, Abh. K. Preuss. Akad. Wiss. p. 30, PL iv. 1902. Calamopitys Beinertiana Scott, Trans. R. Soc. Edinb. Vol. 40, p. 341, Pis. I., IV., V. 1909^. Ullmannites Beinertianus Tuzson, Result. Wiss. Erforsch. Balatonsees, Bd I. Teil i. p. 24. 1911. Eristophyton Bei
. Fossil plants : for students of botany and geology . Paleobotany. XXXII] ERISTOPHYTON 199 Eristofhyton Beinertianum (Goeppert). 1850. Araucarites BeineHianus Goeppert, Mon. Foss. Conif. p. 233, Pk. 42, 43. 1872. Arancarioxylon Beinertianum Kraus, in Schimper's Trait. Pal. Vol. ii. p. 381. 1888. Araucarites Beinertianus Goeppert and Stenzel, Abh. K. Preuss. Akad. Wiss. p. 30, PL iv. 1902. Calamopitys Beinertiana Scott, Trans. R. Soc. Edinb. Vol. 40, p. 341, Pis. I., IV., V. 1909^. Ullmannites Beinertianus Tuzson, Result. Wiss. Erforsch. Balatonsees, Bd I. Teil i. p. 24. 1911. Eristophyton Beinertianum Zalessky, Com. Geol. St Petersb. p. 24. The pith, 13—15 mm. in diameter, is rather larger than in E. fasciculare and is characterised by the occurrence of dark sclerotic nests surrounded by radially disposed rows of parenchyma. The primary xylem strands are more numerous and smaller than in E. fasciculare and these increase in diameter as they approach the secondary wood. In places the primary xylem elements form a more or less continuous band as in Calamopitys Fig. 458. Eristophyton Beinertianum. A strand of primary xylem, showing the protoxylem, px, abutting on the secondary xylem. (x 35. After Zalessky.) The largest leaf-trace bundles at the periphery of the pith are mesarch (fig. 458), but as each trace passes down the pith the reduction in the centripetal xylem is carried further than in E. fasciculare until the xylem-strand becomes endarch in the lower part of its course. The secondary tracheids have usually two contiguous rows of pits and the medullary rays are one cell broad. There can be no doubt as to the generic identity of the two 1 Tuzson (09).. 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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