12- 
IRMATION LEAFLET 
FOREIGN WOODS 
x ores 
t. Product ^ TA:inrftt.nr:.-^ Tores t Service 
. S, Department of Agriculture 
1952 
APITONG 
BAGAC, ENG, 
GURJUN, KERUING, YANG 
D_oterocar'ous s 
Family: Dipterocar; 'acea. 
By 
ELOJS.T -CURRY, Forest Products Technologist 
Division of Silvi cultural Relations 
In the areas where it occurs, the Dipterocarp family, with 19 genera and 
nearly ^00 species, fills the place in timber production that is occupied 
by softwoods, oaks, and other familiar species in the North Temperate zone. 
This Indo-Malayan family extends eastward into New Guinea and the Philippines, 
and two genera occur to the west in the Seychelles Islands and in tropical 
Africa (21) .- The Dipterocarps are made up mainly of species that are noted 
for producing very large trees, often in nearly pure stands (9) • 
The genus Dipterocarpus , to which apitong belongs, includes about 70 species 
of large trees, fleven are found in India, 5 in Ceylon, 15 in the Philippine 
Islands where trey rate as the most abundant structural timber, 1^ or more in 
Borneo (l£), and some 30 others in the ialay Peninsula and the Indian 
Archipelago (h, 5> iii> 21 > 31) . 
37" 
Maintained at I^adison, Wis., in cooperation with the University of Wisconsin. 
2 
Underlined numbers in parentheses refer to the list of numbered references at 
the end of the article. 
Report No. R1920 
-1- 
' culture -Madison 
