
Literature Cited.
Ball, E., 1946. Development in sterile culture of stem tip and subadjacent regions of Tropaeolum majus L. and Lupinus albus L. American Jour. Bot., 33, 301 (see also Nature, 158, 763).
Bower, F. O., 1923. The Ferns, vol. 1. Cambridge, The University Press.
—— 1935. Primitive Land Plants. London, Macmillan and Co.
Campbell, D. H., 1940. The Evolution of the Land Plants (Embryophyta). Stanford, The Stanford University Press.
Darrah, W. C., 1939. Textbook of Palaeobotany. New York, D. Appleton-Century Company.
Dormer, K. J., 1940 Anatomy of the Primary Vascular System in Dicotyledonous Plants. Nature, 158, 737.
Eames, A. J., 1936. Morphology of Vascular Plants, Lower Groups. New York and London, McGraw-Hill Book Company Inc.
Foster, A. S., 1936. Leaf Differentiation in Angiosperms. Bot. Rev., 2, 349.
—— 1939. Problems of Structure, Growth, and Evolution in the Shoot Apex of Seed Plants. Bot. Rev., 5, 454.
Jeffrey, E. C., 1899a. The Development, Structure and Affinities of the Genus Equisetum. Mem. Boston Soc. Nat. Hist., 5, 155.
—— 1899b. The Morphology of the Central Cylinder in the Angiosperms. Trans. Canadian Inst., 6, 599.
—— 1903. The Structure and Development of the Stem in the Pteridophyta and Gymnosperms. Phil. Trans. Roy. Soc. London, B, 195, 119 (read 1901).
—— 1908. Are There Foliar Gaps in the Lycopsida? Bot. Gaz., 46, 241.
—— 1917. The Anatomy of Woody Plants, Chicago, University of Chicago Press.
Just, Th., 1945. The Proper Designation of the Vascular Plant. Bot. Rev., 11, 299.
Kidston and Lang, 1917–1921. On Old Red Sandstone Plants showing Structure from the Rhynie Chert Bed, Aberdeenshire, Pts. I–V, Trans. Roy. Soc. Edinburgh, 51–52.
Louis, J., 1935. L'Ontogénèse du Système Conducteur dans la pousse feuillée des Dicotylées et des Gymnospermes. La Cellule, 44, 87.
Newman, I. V., 1936. Studies in the Australian Acacias, VI. The Meristematic Activity of the Floral Apex of Acacia longifolia and Acacia suaveolens as a Histogenetic Study of the Ontogeny of the Carpel. Proc. Linnean Soc. N.S. Wales, 61, 56.
Priestley, J. H., 1928. The Meristematic Tissues of the Plant. Biol. Rev. and Biol. Proc. Cambridge Philos. Soc., 3, 1.
—— 1929. Cell Growth and Cell Division in the Shoot of the Flowering Plant. New Phyt., 28, 54.
—— and Swingle, C. F., 1929. Vegetative Propagation from the Standpoint of Plant Anatomy. United States Dept. of Agric., Tech. Bull. 151.
Rendle, A. B., 1930. The Classification of Flowering Plants, vol. 1, 2nd Edn., Cambridge, The University Press.
Schmidt, A., 1924. Histologische Studien an phanerogamen Vegetationspunkten. Bot. Archiv., 8, 345 (quoted from Priestley, 1929, pp. 58, 62; Louis, 1935, p. 98).
Schüepp, O., 1926. Die Meristeme. Handbuch der Pflanzenanatomie, Abt. 1, Teil 2 (quoted from Priestley, 1928, pp. 1, 6).

Scott, D. H., 1909. Studies in Fossil Botany, 2nd Edn. London, A. & C. Black Ltd.
—— 1920. Studies in Fossil Botany, 3rd. Edn., vol. 1. London, A. & C. Black Ltd.
—— 1923. Ibid., vol. 2.
Wardlaw, C. W., 1944a. Experimental Observations on the Relation between Leaf Development and Stelar Morphology in Species of Dryopteris. Nature, 153, 377.
—— 1944b. Bud Regeneration at Cut ParenchyAmatous Surfaces in Onocleoid Ferns. Nature, 153, 588.
—— 1945. An Experimental Treatment of the Apical Meristem in Ferns. Nature, 156, 39.
Zimmermann, W., 1930. Phylogenie der Pflanzen. Jena, Gustav Fischer. (Quoted from Bower, 1935, ch. 30.)
P.S.—Recent work by Wardlaw (see above) would modify the figure given here for the fern apex, by a small-celled tissue (meristematic) stretching across from the ends of the procambia to form a concave zone below the apical cell. This may not be universal among the ferns.—I. V. N., June, 1948.
