References
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Hoskins, J. H. & Cross, A. T. (1940): Two new species of Lepidostrobus from the Lower Pottsville of Orange Country, Indiana. – The American Midland Naturalist 24(2): 421–436.
Berry, E. W. (1924): The Middle and Upper Eocene floras of southeastern North America. – Professional Papers, United States Geological Survey 92: 1–199, LXV pls.
Arber, E. A. N. (1917): The earlier Mesozoic floras of New Zealand. – New Zealand Geological Survey, Paleontological Bulletin 6: 1–80 + 14 pls.
Berry, E. W. (1916): The Lower Eocene floras of Southeastern North America. – Professional Papers, United States Geological Survey 91: 1–481.
Berry, E. W. (1914): The Upper Cretaceous and Eocene floras of South Carolina and Georgia. – Professional Papers, United States Geological Survey 84: 1–200.
Lesquereux, C. L. (1892): The flora of the Dakota Group: A posthumous work. – Monographs of the United States Geological Survey 17: 1–400, 66 pls.
Kidston, R. (1890): The Yorkshire Carboniferous flora. First report. – The transactions of the Yorkshire Naturalists' Union 14(1888): 3–66.
Ward, L. F. (1887): Types of the Laramie flora. – Bulletin of the United States Geological Survey 37: 1–354.
Schimper, W. P. (1872): Traité de Paléontologie Végétale, ou la Flore de Monde primitif dans ses rapports avec les formations géologiques et la flore du monde actuel. J. B. Baillière et Fils, Paris; Baillière, Tindall and Cox, Londres; Carlos Bailly-Baillière, Madrid 2(2): 521–968.
Schimper, W. P. (1870): Traité de Paléontologie Végétale, ou la Flore de Monde primitif dans ses rapports avec les formations géologiques et la flore du monde actuel. J. B. Baillière et Fils, Paris; Baillière, Tindall and Cox, Londres; Carlos Bailly-Baillière, Madrid 2(1): 1–520.
Schimper, W. P. (1869): Traité de Paléontologie Végétale, ou la Flore de Monde primitif dans ses rapports avec les formations géologiques et la flore du monde actuel. J. B. Baillière et Fils, Paris; Hyppolyte Baillière, Londres; C. Bailly-Baillière, Madrid 1: 740 pp.
Miller, H. (1857): The testimony of the rock; or, Geology in its bearings on the two theologies, nature and revealed. Thomas Constable & co., Shepherd & Elliot, Edinburgh, Hamilton, Adams & co., London: 500 pp.
Lindley, J. & Hutton, W. (1831): The fossil flora of Great Britain. London: J. Ridgway 1: 218 pp.