Stomata in Cycadaceae

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Cycas (Plat e I. Figs., 1, la , 2, 2a) – Microcycas (Plat e I. Figs. 3, 3a) – Stangeria (Figs, 4, 4a) – Bowetiia (Figs. 5, 5a) – Dioon (Figs. 6, 6a)


Determination of Cycas genera as suggested by leaf epidermis structure

by Greguss P. (n.d.)

Director of Institute for Botany of the University, Szeged, Hungary

* Detail of the author’s work : Xylotomy and leaf epidermis of recent Cycadaceae, in preparation now  –

We hope to offer some help to botanists dealing with recent Cycadaceae but also to paleontologists, when attempting to determine the individual genera by the structure of leaf epidermis on the basis of the following key of determination and two photo-plates. The magnification of the leaves of characteristic representatives of the individual genera (both from surface an d backside) is uniformly 300X .

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Encephalartos (Plate II., Figs. 7, 7a) – Macrozamia, (Lepidozamia) (Figs. 8, 8a, 10, 10a, 11, 11a) – Ceratozamia (Plat e II., Figs. 9, 9a ) – Zamia (Plat e II. Figs. 12, 12a)

Published by

Willem Van Cotthem

Honorary Professor of Botany, University of Ghent (Belgium). Scientific Consultant for Desertification and Sustainable Development.

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