Acknowledgements
| We are grateful to the Directors/Curators of the following herbaria for herbarium and library facilities and for sending the material on loan: B, BM, CAL, E, GH, K, KUH, MEL, MICH, NA, O, PH and RAW. Thanks are also due to Prof. Loutfy Boulos (Egypt) for discussing various problems from time to time for the improvement of the manuscript. We gratefully acknowledge financial support for this publication from the Andrew W. Mellon Foundation and National Science Foundation (DEB 0103783), Washington, U.S.A. obtained through the Missouri Botanical Garden, St. Louis, U.S.A. We are grateful to Professor Peter H. Raven of the Missouri Botanical Garden for his assistance in securing the support. Grateful thanks are due to Professor Zafar Saied Saify, Vice-Chancellor, University of Karachi and Professor M. Qaiser, Chairman, Department of Botany, University of Karachi for providing working facilities to the project and for their understanding and encouragement. |
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