9 



In examining the above sunnnary it will be noted that Gil 'genera and 1,151 

 species and varieties are enumerated from an area of approximately -4,426 hec- 

 tares. The vascular cryptogams and flowering plants are distributed into 138 

 families and 584 genera, 1,114 species and varieties being represented. So far 

 as can be determined at this time, 479 species, or 41 per cent of the total 

 number found in the reserve, are endemic to the Philippines, thus emphasizing 

 the insular character of the vegetation; 54 have apparently been introduced, 

 although it is frequently difficult to determine this point and the greater propor- 

 tion of the latter class are so well established that they must be considered to 

 be constituents of the Philippine flora. Six hundred and eighty-six species, or 

 nearly CO per cent of the total number, are woody plants — that is, trees, shrubs, 

 scandent shrubs, or undershrubs. Of these, 485, or 42 per cent of the total, are 

 trees; thvis the arborescent character of the vegetation is strongly marked. In this 

 classification all plants which in their period of growth may reach a height of 5 or 

 6 meters, or more, and which have a well-defined trunk and woody tissue, have been 

 considered to be trees. Shrubs and undershrubs are represented by 74 species, ami 

 scandent shrubs by 127. Four hundred and sixty-five species are herbaceous, 

 although it has frequently been difficult to de'fine the difl'erence between herbaceous 

 and woody plants. Musci, Hepaticcc, Filices, Gramineic, Orchidacece, and Cypera- 

 cece account for a large percentage of these, but many of the ferns here classified 

 as herbaceous plants are decidedly woody in character. 



ACKNOWLEDGMENTS. 



To the following botanists I am under obligation for the identification 

 of material which has made the publication of this paper possible at the 

 present time : Dr. V. F. Brotherus, Helsingf ors^ Finland, Musci ; Dr. A. 

 W. Evans, New Haven, Conn., U. S. A., Hepaticce; C. B. Clarke, esq., 

 Kew, England, Cyperacece., and Acanthacece ; Dr. 0. Beccari, Florence, 

 Italy, PalmcB; Dr. A. Engler, Berlin, Aracece; Oakes Ames, esq.. North 

 Easton, Mass., U. S. A., Orchidacece; H. N. Ridley, Singapore, Zinger- 

 beracew; Dr. 0. Warburg, Berlin, Germany, Myristicacece ; Maj. D. Prain, 

 Calcutta, India, Leguminosce: Dr. L. Radlkofer, Munich, Germany, 

 Sapindacece; Dr. A. Brand, Frankfort a. d. Oder, Germany, Simploca- 

 cece. To Sir William T. Thistleton-Dyer, late director of the Eoyal 

 Gardens, Kew, England, I am indebted for some specific miscellaneous 

 identifications and comparisons with types. Dr. E. B. Copeland, formerly 

 of this Bureau, has determined the vascular cryptogams which are enumer- 

 ated, and Mr. A. D. E. Elmer, also at one time connected with this 

 Bureau, has partly identified the Biihiacece and Composita'. To Capt. 

 G. P. xVhern, Chief of the Forestry Bureau. I am indelited for extensive 

 collections of material, made imder his direction by employees of his 

 Bureau, and for various courtesies extended to myself and other members 

 of this Laboratory during the prosecution of the investigations leading 

 to the preparation of this paper. 



