10 



material available to me for study has been the large collections 

 made by native collectors working in Sarawak for the Bureau 

 of Science under the direction of Major J. C. Moulton, 

 formerly director of the Sarawak Museum; extensive collections 

 made by Mrs. Clemens and Mr. Topping on Mount Kinabalu in 

 1915, with a small collection from the same locality made in 

 1916 by Mr. Haslam ; material collected by Dr. Foxworthy in 

 Sarawak and British North Borneo; a small collection made 

 in British North Borneo by Dr. H. S. Yates; a series of about 

 500 numbers prepared chiefly by Messrs. Villamil and Agama 

 under the direction of Mr. D. M. Matthews, Conservator of 

 Forests, British North Borneo; and a small collection made by 

 myself in Labuan in 1902. Bornean material received in 

 exchange from various sources includes a nearly complete set 

 of Charles Hose's Sarawak collection, some of Korthals's 

 specimens, some material from Dr. Beccari, notably a fairly 

 complete set of his Bornean Dipterocarpaceae, sundry specimens 

 from the collections of Ridley, Teysmann, Hewitt. Haviland, 

 Hallier, Nieuwenhuis and Jaheri, and a very few from 

 Grabowski's collection. I had seen no material collected by Low, 

 Burbidge. Barber, Miss Gibbs, Motley, and others mentioned 

 above, when this list was in preparation. 



When the rich Bornean collections now available in such 

 herbaria as those of Kew, Leiden, and Buitenzorg shall have 

 been thoroughly worked up, the list of Bornean species will have 

 been very greatly increased. At the present time no singl^ 

 family, with the exception of some composed of few small genera 

 are thoroughly known so far as their Bornean representatives 

 are concerned, and the study of material now available in the 

 large herbaria mentioned above will doubtless yield hundreds 

 of species new to the Bornean flora, either in the form of 

 undescribed forms, or those already described from 

 extra-Bornean material, especially from the Malay Peninsula, 

 Sumatra, Java, Celebes, and the Philippines. Current and 

 future collections made in any part of Borneo, except perhaps 

 in the cultivated areas, coastal regions, and the immediate 

 vicinity of settlements must of necessity yield a high percentage 

 of species as yet entirely unknown, or at least not definitely 

 known from Borneo. 



In the preparation of this list by no means all the material 

 available to me has been identified for the chief reason that 

 I have not had sufficient time available to devote to its study, 

 supplemented by the facts that some descriptions of Bornean 

 species are at present inaccessible to me, and others are so 

 imperfect and incomplete that properly to understand the status 

 and relationships of various proposed species in certain families, 

 the actual types must or should be examined. As a matter of 



