Further Contribution to our Knowledge of the Anatomy of Ptilophyllum
DOI:
https://doi.org/10.54991/jop.1967.525Abstract
The epidermal features and the anatomy of the rachis and pinna of a well preserved but fragmentary petrified specimen of Ptilophyllum from the Rajmahal hills are described in detail. The rachis contains a double arc of collateral vascular bundles comparable to those found in the Pteridosperms. Sclerenchymatous patches and sclereids are found in the cortex. The epidermal features agree with those already described for this species by Sahni and Rao and others. It is found that a single bundle coming off from the upper corner of the double arc of the vascular bundles of the rachis, divides into 2 at the base of the pinna and repeatedly dichotomises at different levels to form a more or Jess parallel venation. The bundles of the pinnae are collateral, exarch with a parenchymatous bundle sheath. Isolated and grouped sclereids occur scattered in the palisade and spongy mesophyll.
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Bancroft N 1913. On some Indian Jurassic Gymnosperms. Trans. Linn. Soc. Bot., 8, Pt. 2: 69-86.
Branes B & Duerden H 1930. On the preparation of celluloid transfers from rocks containing fossil plants. New Phytol., 29: 74.
Bose MN 1953. Ptilophyllum amarjolense, sp. nov. from the Rajmahal Hills, Bihar. Proc. natn. Sci. India. 19 (5): 605-612.
Essau K 1962. Plant Anatomy. New York, London.
Foster AS 1949. Practical plant anatomy. Princeton, etc.
Ganju PN 1946. On a Collection of Jurassic. Plants from the Rajmahal Hills, Bihar. J. Indian bot. Soc., M.O.P. Iyengar Comm. Vol. 51-84.
Jacob K & Jacob C 1954. Cuticular Study of Indian Ptilophyllum fronds from Cutch and Jubbulpore. Palaeont. indica, 33 (1): 1-33.
Menon VK, Malaviya M & Rao AR 1965. Notes on some fossil sclereids. Curr. Sci., 34 (22): 642-644.
Mittre V 1956. Studies on the fossil flora of Nipania (Rajmahal Series), Bihar. Ph.D. Thesis, univ. Lucknow.
Morris J 1840. Memoir to illustrate a geological map of Cutch (Grant, C.W.) Trans. geol. Soc. 2nd ser, 5, pt. 2: 289.
Rao AR 1943. The structure and affinities of Taeniopteris Spatulata Mc Cl. Proc. natn. Acad. Sci. India. 13, pt. 6: 333-355.
Idem 1948. ‘Palaeobotany in India’ Report (VI) J. Indian bot. Soc. 26 (4): 253.
Sahni B 1932. A petrified Williamsonia (W. Sewardiana, Sp. nov.) from the Rajmahal Hills, India. Palaeont. indica. N.S., 20 (3): 1-19.
Sahni B & Rao AR 1933. On some Jurassic plants from Rajmahal Hills. J. Asiat. Soc. Beng. N.S., 27 (2): 183-208.
Seward 1900. The Jurassic flora, 1. Yorkshire, British Museum Catalogue. 194.
Idem 1917. Fossil plants, 3. Cambridge.
Seward AC & Sahni B 1920. Indian Gondwana plants: A revision. Palaeont. indica N.S. 7, mem. 1.
Tschirch A 1889. Angewandte Pflanzenanatomie. Wien und Leipzig.
Walton J. 1928. A method of preparing sections of fossil plants contained in coal balls or in other types of petrifactions. Nature, Lond. 122: 571.
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