999 PHILIPPINE RESINS, GUMS, AND OILS 
per year, which would give a possible borneol yield of from 50 . 
to 200 kilos per hectare. Although this plant grows vigorously 
in the Philippines, it is questionable if it could be cultivated 
profitably. 
Blumea balsamifera is a coarse, erect, half-woody herb 1.5 to 
3 meters in height. The stems are 2.5 centimeters in diam- 
eter. The leaves are from 7 to 20 centimeters in length, spear 
shaped, and with toothed margins and short petioles. 
This species grows very abundantly in waste places in the 
Philippines. It is frequently found in grass areas, as it readily 
sprouts from the ground after the aerial parts of the plant have 
been killed by fire. It is thus one of the comparatively few 
species of plants which can withstand grass fires. 
