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Berkeley, M. J. 



1857. Introduction to Cryptogamic Botany. London. 



Bower, F. 0. 



1887. On apospory and allied phenomena. Trans. Linn. Soc. London Bot., 2(pt. 14): 

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1889. The comparative examination of the meristems of ferns as a phylogenetic 



study. Ann. Bot, London, 3:305-392. 



1908. The Origin of a Land Flora. London. 



1923-1928. The Ferns. Vol. 1 (1923); Vol. 2 (1926); Vol. 3 (1928). Cambridge. 



1935. Primitive Land Plants. London. 



Breuner, G. 



1902. On the anatomy of Danaea and other Marattiaceae. Ann. Bot., London, 16:523. 



Brongniart, a. 



1828-1838. Histoire des vegetaux fossiles. Paris. 



Bruchmann, H. 



1898. tJber die Prothallien und die Keimpflanzen mehrerer europaischer Lycopodien 

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1904. tJber das Prothallium und Keimpflanze von OpJiioglossum vulgatum L. Bot. 

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1910. Die Keimung der Sporen und die Entwicklung der Prothallien von Lycopodium 



clavatum, L. annotinum und L. selago. Flora, 101:220-267. 



Campbell, D. H. 



1890. On the affinities of the Filicineae. Bot. Gaz., 15:1-7. 



1895. The Structure and Development of Mosses and Ferns (Archegoniatae). London. 

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1911. The Eusporangiatea. Carnegie Inst. Publ. No. 140. 



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1874. Bedeutung des Generationswechsels der Pflanzen. Prag. 



Ching, R. C. 



1935-1938. A revision of the Chinese and Sikkim-Himalayan Dryopteris with refer- 

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Christensen, C. 



1905-1906. Index Filicum. Suppls. I-III (1913, 1917, 1924). Copenhagen. 



1907,1913,1920. A monograph of the genus Dryopteris (American spp.). K. Dansk. 



Vidensk. Selsk. 

 1932. The Pteriodophyta of Madagascar. Dansk Bot. Ark., Vol. 7. 

 1938. Filicinae. In Verdoorn, Manual of Pteriodology. 



CooKSON, Isabel C. 



1935. On plant-remains from the Silurian of Australia, that extend and connect floras 

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COPELAND, E. B. 



1947. Genera Filicum. Waltham, Mass. 



Croft, W. N., and W. H. Lang 



1942. The Lower Devonian flora of the Senni Beds of Monmouthshire and Brecon- 

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