. Fossil plants : for students of botany and geology . Paleobotany. XL] BAIBEA 49 In a former account of this species^ I included the specimen repro- duced in fig. 661 (p. 66), also a similar specimen figured by Phillips^ as a distinct type, Baiera micro- phylla. The examination of addi- tional material collected from the Yorkshire coast by Mr Hamshaw Thomas leads me to substitute Czekanowshia for Baiera as the more appropriate name for the bunch of leaves represented in fig. 661 which is in all probability identical with B. microphylla as figured by Phillips. In the case of incomplete leaves
. Fossil plants : for students of botany and geology . Paleobotany. XL] BAIBEA 49 In a former account of this species^ I included the specimen repro- duced in fig. 661 (p. 66), also a similar specimen figured by Phillips^ as a distinct type, Baiera micro- phylla. The examination of addi- tional material collected from the Yorkshire coast by Mr Hamshaw Thomas leads me to substitute Czekanowshia for Baiera as the more appropriate name for the bunch of leaves represented in fig. 661 which is in all probability identical with B. microphylla as figured by Phillips. In the case of incomplete leaves it is by no means easy to distinguish B. Lindleyana from Czehanowskia microphylla; but in the latter the branches of the lamina are separated by a smaller angle and if cuticular preparations are available the stomata afford a means of differentiation: in Baiera the guard-cells are surrounded by a circular group of cells, while in Czekanowskia the subsidiary cells are longer and narrower, forming a more oblong group. Baiera Lindleyana is recorded also from Middle Jurassic rocks in Chinese^ Dzungaria and from Upper Jurassic rocks in Scotland*. Some specimens described by Fontaine^ from the Black Hills (Lower Cretaceous) as Czekanowskia nervosa Heer are, as Berry* points out, probably leaves of a Baiera, and I am disposed to refer them to B. Lindleyana. Baiera Brauniana (Dunker). This species', represented by leaves from Wealden and Upper Jurassic rocks, agrees in the form and dissection of the lamina 1 Seward (00) B. p. 266, fig. 46" (p. 268). 2 PhilUps (75) A. p. 200, fig. 9. ' Seward (11) PI. iv. fig. 44. ^ Seward (11^) PI. v. fig. 105. 5 Fontaine in Ward (09) B. p. 685, PI. 169, figs. 1, 2. « Berry (11) p. 374. ' Dunker (46) A. p. 11, PI. v. fig. 4. s. IV 4. Fig. 653. Baiera Lindleyana. (British Museum; A, 39208; B, V. 3682.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appear
Size: 1170px × 2136px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpublishercambr, bookyear1898
