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1876. Die Frage nach der Gymnospermie der Cycadeen erlautert durch die Stellung 

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1902. On the anatomy of Danaea and other Marattiaceae. Ann. Bot., 16:517-552. 



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1849. Tableau des genres de vegetaux fossiles consideres sous le point de vue de leur 

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1825(1826). Character and description of Kingia, a new genus of plants found on 

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 its unimpregnated ovulum; and on the female flower of Cycadeae and Coni- 

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1844. On the plurality and development of the embryos in the seeds of Coniferae. 

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BUCHHOLZ, J. T. 



1929. The embryogeny of the conifers. Proc. Internat. Cong. Plant Sci., Ithaca (1926), 

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1922. L'origine phylogenique des plantes vasculaires d'apres Lignier et la nouvelle 

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