The stomatal distribution pattern as an important taxonomic tool.


Distributional patterns and taxonomic importance of foliar stomata.

by Rajagopal T. (1979)

in Indian Journal of Botany: Vol. 2, 63–69 –


Based on the presence or absence of stomata on the leaves, a new category, astomatic, is recognized besides the already known epistomatic, hypostomatic and amphistomatic categories.

Distribution patterns of foliar stomata embracing their orientation and dispersion and in relation to the costal cells in a given leaf surface are distinguished into 8 groups [I-VIII] consisting of 11 types, of which the group VII in dicotyledons and groups I to III and V in monocotyledons are predominant. The group VII, B-1, can be used as indicator of adaxial surface in dicotyledonous leaves.

The stomatal distribution pattern along with other epidermal characters can be used as an important taxonomic tool.



Published by

Willem Van Cotthem

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

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