Phylogenetic and Systematic Value of Stomata in Bicarpellatae (BENTHAM et HOOKER sensu stricto) †Dedicated to Prof. W. R. J. VAN COTTHEM
My sincere thanks for this dedication
by Gill L. S., Nyawaume H. O. K. (1990)
L. S. Gill, University of Benin (Benin City, Nigeria)
H. G. K. Nyawuame, University of Benin (Benin City, Nigeria)
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in Feddes Repertorium Volume 101, Issue 9-10, 1990, 453–498 –
Abstract
Foliar epidermal morphology and ontogeny of stomata are described for 320 taxa distributed in 13 families of the Bicarpellatae.
The epidermal cells are generally straight-walled in the woody taxa but sinuous in herbs and small shrubs.
The different stomata types commonly described in the dicotyledons viz: anomocytic, anisocytic, paracytic and diacytic have been recognized during the present study.
The families Acanthaceae and Labiatae are remarkable in showing only diacytic stomata generally regarded as the most advanced. The distribution, size and frequency of stomata could be used to establish systematic divisions and to suggest phylogenetic relationships within the Bicarpellatae.
Ontogeny of stomata is uniform only in the family Oleaceae but heterogenous in all the other families. Evidence from stomatal ontogeny therefore appears to be taxonomically important only at the genus level.
Single guard-celled stomata, aborted stomata and contiguous stomata are of regular occurrence in the presently investigated families except the family Scrophulariaceae which showed no stomatal abnormalities.
Adjacent stomata with cytoplasmic connections between their guard cells are of rare occurrence and such stomata are recorded in only six taxa distributed in the families Gentianaceae, Oleaceae and Solanaceae.
PLANT STOMATA ENCYCLOPEDIA 