While checking up a few doubtful points on the following Indian species of Commelinaceae in different herbaria in the United Kingdom, with the background of the data gathered from the herbaria in the Continent and in India, some interesting details have been made out by the writer during August, 1964 for clarifying the status of those species. He is thankful to the authorities of the herbaria at the Royal Botanic Gardens of Edinburgh and Kew, Department of Botany, University of Glasgow, and the British Museum (Natural History) and the Linnean Society of London, and also the Rijksherbarium, Leiden, Institute of Systematic Botany, Utrecht, Naturhistorisches Museum, Wien, and Botanisches Institut, Wien for their kind help and co-operation in allowing the writer to study the species and to provide him with photos and necessary information on this subject; also to Mr. B. L. Burtt, Royal Botanic Gardens, Edinburgh and to Mr. J. P. M. Brenan and Mr. A. Smith, Royal Botanic Gardens, Kew for their critical suggestions during discussion and correspondence, and to Dr. H. Santapau, Director, Botanical Survey of India for his kind encouragement in the study of this family and for his Latin translation of the diagnosis.