9 
ill examining tlie above snmniary it will be noted that Oil genera and 1,151 
species and varieties are enumerated from an area of approximately 4,426 hec- 
tares. The vascular cryptogams and llowering 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 Philippiines, thus emphasizing 
the insular character of the vegetation; 54 have apparently been introduced, 
although it is frequently difiicult 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 GO per cent of the total number, are woody plants — that is, trees, slii'ubs, 
scandent shrubs, or rmdershrubs. Of these, 485, or 42 per cent of the total, are 
trees; thus 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 underslirubs are represented by 74 species, and 
scandent shrubs by 127. Four hundred and sixty-five species are herbaceous, 
although it has frequently been difficult to define the difference between herbaceous 
and woody plants. Musci, Hepaticce, Filiccs, Gramineu', Orchidacece, and Gypera- 
cece account for a large percentage of these, but many of the ferns here classified 
as herbaceous plants are decidedly woody in character. 
ACKNOWLEDGMENTS. 
I 
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, Helsingfors, Finland, M usd ; 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, Palmce-, Dr. A. Engler, Berlin, Aracece-, Oakes Ames, esq., North 
Easton, Mass., U. S. A., Orchidacece-, H. N. Ridley, Singapore, Zinger- 
heracece; Dr. 0. Warburg, Berlin, Germany, Myristicacece ; Maj. D. Prain, 
Calcutta, India, Leguminosce; Dr. L. Radlkofer, Munich, Germany, 
Sajnndacece; Dr. A. Brand, Frankfort a. d. Oder, Germany, Simploca- 
cece. To Sir William T. Thistleton-Dyer, late director of the Royal 
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 Avith this 
Bureau, has partly identified the Eubiacece and Coinpositce. To Capt. 
G. P. Ahern, Chief of the Forestry Bureau, I am indebted for extensive 
collections of material, made under his direction by emjrloyees 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. 
