IX. A, S 



Brown and Mathews: Dipterocarp Forests 



435 



and other patches in which the total volume is small. The 

 average volume over large areas is, therefore, much less than in 

 northern Negros. 



The poorer development of the main story, resulting in the 

 entrance of a large number of species other than dipterocarps, 

 has produced well-developed second and third stories. For the 

 same reason the undergrowth is denser, except on the ridges, 

 than in forests where the main story is more prominent. 

 This undergrowth is composed largely of tree seedlings, as is 

 shown by Table VI. 



Table VI. — Reproduction plot, 5 by 50 meters, in forest of Bataan. 



Species. 



Seed- 

 lings 

 under 

 2 me- 

 ters. 



Diameter class in centimeters. 



1. 



2. 



3. 



4. 



5. 



6. 



7. 



8. 



SkoyecL 'DolitsveTmcL (tanoruile) 



5 



3 



6 



12 



219 



















Dipterocarpus vernicifluus (panao) ... 

 Dipterocarpus grandijlorus (apitong) _ 



Hopea acuminata (dalindingan) 



Pentacme contorta (white lauan) 



Shorea guiso (gui jo) - ^ . - 



















1 

 1 

 1 

















1 

 1 





1 







1 









1 



1 











Anisoptera thurifera (palosapis) 



Eugenia sp (macaasim) 



2 

































CalophyllitTti blancoi (palomaria) 



140 

 647 

 409 



2 

 6 



1 

 26 

















15 



4 



7 



2 



3 



2 



Miscellaneous brush ._ 









! 





1 1 



Total 



1,443 



11 



29 



16 5 



7 



3 



4 



2 



Total trees 



Total dipterocarps . 























, 1 



Species. 



Diameter class in centimeters. 



Total. 



9. 



10. 



20. 



30. 



40. 



50. 



Over 



50. 



Shwea polysperma (tanguile) _ 





1 











6 



3 

 7 



18 



222 



1 



2 



2 



144 



725 



409 

















GiptcTocarpus gTandiJiorus (apitong) 

























1 







1 















Skoirca guiso (guijo) 





































1 











1 









1 











9 



2 



2 







Miscellaneous brush 











Total - - 



















10 



3 



2 



2 





2 



1,539 



1,130 



2R9 



Total trees 







Total dipterocarps 

























1 









1 



Plants which are trees 

 Plants which are dipterocarps 

 Trees which are dipterocarps 



Per cent. 

 73.4 

 16.7 

 23.0 



