448 



The Philippine Journal of Science 



1914 



The stand of timber shown here is much heavier and is dis- 

 tributed throughout a smaller number of species. In 403 trees 

 on 1 hectare, the volume of 206 cubic meters, of a total of 278 

 cubic meters, is distributed among 18 listed species and but 26 

 per cent of the volume occurs in trees that were impracticable 

 of identification by inspection. Furthermore, 3 species of dip- 

 terocarps were reported on 1 hectare — guijo, represented by 3 

 trees ; bagtican-lauan, represented by 33 trees ; and white lauan, 

 represented by 3 trees. 



At elevations of from 400 to 600 meters, and at some lower 

 elevations in the more inaccessible parts of the forest, we find 

 the original forest in an almost undisturbed condition. For the 

 most part, however, this original forest is rather poor in qual- 

 ity, due to the fact that it occurs on the upper fringe of the dip- 

 terocarp belt and in part on steep slopes with shallow soils. The 

 total area of this class of forest when compared with the area 

 around the outside of the forest, which has been logged over, 

 is relatively insignificant. However, it gives us some indication 

 of what the forest was at lower elevations. 



In Table XII, compiled from information gathered in a small 

 area of virgin forest at an elevation of 450 meters, are given 

 exact data as to the composition and volume of one-quarter of 

 1 hectare. 



Table XII. — Stand of trees over 2 meters in height on 0^5 hectare. Alti- 

 tude U50 meters on Mount Maquiling, Laguna Province, Luzon. 



No. i 



Species. 



1 

 2 

 3 



4 



5 



6 



7 



8 



9 



10 



11 



12 



13 



14 



Dipterocarps: 



Parashorea plicata (ba^tican lauan) . 



Shorea guiso (guijo) -__ _ 



Hopea acuminata (dalindingan) 



MiseeltanecuB species: 



Bisclwfia javanica (tuai) 



Canarium luzoniciim (pili) 



Canarium vUlosum (pasrsahingrin) .._ 



Canarium sp. (pagsahingrin) 



Canarium. sp 



Celtis pkilippensis (raalaicmo) 



Eugenia sim,ilis (malaruhat) - 



Eugenia luzonensis (malaruhat puti) 



Eugenia nuinarujuil 



Eugenia sp 



Meliosma macropkyVa 



Indi- 

 vid- 

 uals. 



Volume. » 



m'lTeV-t" 

 meter . i„_„p. 



Total, classes V^ ^^ 



10-40 1^^^™- 



=™- I over. 



ieu.m. 



29 18.47 



4 



1 



I I 



Great- Great-I Story 



est j est to 



height diam- | which 



on eter on tree be- 



plot. 



eu. m. I cu. m. 

 2.65 i 15.82 



plot. I longs. 



0.09 



0.09 





4.31 

 3.04 



4.31 



3.04 



0.07 



0.07 





0.14 

 8.92 

 0.05 



0.14 

 0.05 



8.92 









0.46 



0.46 







m. 



em.. 



35.95 



96.0 



10.50 



15.0 



2.40 



2.0 



21.00 



72.0 



23.60 



58.0 



5.80 



6.0 



10.10 

 4.90 



18.36 



26.00 

 6.85 

 3.00 

 2.30 



21.25 



17.0 



5.0 



15.0 



95.0 



13.0 



2.6 



2.5 



25.0 



1 

 1 

 1 



1 

 1 

 1 

 1 

 1 

 1 

 1 

 1 

 IT 

 1? 

 1 



