68 



necessary to adopt some definite plan of investigation. To me the plan 

 outlined above appears to be the most practicable one, and the one that will 

 be productive of the best results. 



As Java was divided by Dr. Koorders into three geographical regions 

 from east to west, so, at his suggestion, the Philippine Archipelago can 

 be divided into preferably three geographical regions, from north to 

 south. In this preliminary report I would recommend that the Archi- 

 pelago be divided into the following regions for the study of the forest 

 flora: First, the northern or Luzon region, to consist of the Islands of 

 Luzon, Mindoro, and Marinduque, with their outlying smaller islands; 

 second, the central or Samar-Paragua region, to consist of the Islands 

 of Samar, Le)i;e, Masbate, Bohol, Cebu, Negros, Guimaras, Panay, Cala- 

 mianes, Paragua, etc.; third, the southern or Mindanao region, to con- 

 sist of the Island of Mindanao, the Sulu Archipelago, and the outlying 

 smaller islands. 



As in the Philippines we have no mountains equalling those of Java in 

 altitude, it will be more convenient to distinguish but three altitudinal 

 sections rather than four, as in the investigations in Java. First, from 

 the sea level to 1,000 meters in altitude; second, from 1,000 to 2,000 

 meters in altitude; and third, all mountain tops above 2,000 meters. 



For the Luzon region the letters a, h, c, d, e, f can be reserved ; for the 

 Samar-Paragua region the letters g, h, i, j, Ic, I, and for the Mindanao 

 region the letters m, n, p, r, s, t, w. 



For the first altitudinal section the sequence of numbers between 1 and 

 3000 can be reserved; for the second altitudinal region the numbers be- 

 tween 3001 and 5000, and for the third region, or all altitudes above 2,000 

 meters, the numbers from 5001 to 5500. 



Proposed botanu:al regions for the purpose of studying the forest flora of the Philippine 



Archipelago. 



I. 



II. 



III. 



I. 



II. 



III. 



Altitudinal section. 



NoRTnERN OR LuzoN Reoiox. 



Sea level to 1,000 meters 



1,000 meters to 2,000 meters. 

 2,000 meters -| 



Central or Samar-Paraoua Region. 



SeA level to 1,000 meters 



1,000 meters to 2,000 meters. 

 2,000 meters -f. 



Numbers. 



1-3000 

 3001-5000 

 5001-5500 



1-3000 

 3001-5000 

 5001-5500 



Southern or Mindanao Region. 



I. Sea level to 1,000 meters -_ 1-3000 



II. 1,000 meters to 2,000 meters i 3001-5000 



III. 2,000 meters + ! 5001-5500 



Letters. 



a, b, c, d, e,f. 



y, li, ',j> k, I. 



m,ri,p,r,8,t,w. 



