240 
FOXWORTHY. 
collecting these resins. The resins of the dipterocarps have not become 
so important commercially in the Philippines as in other parts of the 
Malayan region. 
TAXONOMY. 
The following generic key is adapted from Brandis. It includes 
P achy no car pm and Dryobalanops , which have not yet been found in the 
Archipelago, because it seems probable that they may occur in the 
southern islands. 
A. Calyx-wings longer than fruit, 
a. Fruit with 5 long wings. 
b. Stipule-scars encircling the twigs; leaves thin, glaucous beneath, with a 
fold between the distant secondary nerves 6. Parashorea 
bb. Stipule-scars not encircling the twigs ; leaves with finely crowded, parallel 
secondary nerves, coriaceous ...... Dryobalanops 
aa. Fruit with less than 5 long wings, 
b. Long wings 3. 
c. Secondary nerves close and numerous 5. Shorea 
cc. Secondary nerves 6 or 7 and distant 4. Pentacme 
bb. Long wings 2. 
c. Bark not resinous 7. Vatica 
cc. Bark resinous. 
d. Calyx-tube not enclosing fruit 3. Hopea 
dd. Calyx-tube enclosing fruit. 
e. Stipule-scars encircling twig ; very large number of resin-canals in 
circumference of pith 1. Dipterocarpus 
ee. Stipule-scars not encircling twig; 18-24 resin-canals in circum- 
ference of pith — > 2. Anisoptera 
A A. Calyx-wings shorter than fruit Pachynocarpus 
Previous to the days of American work in the Philippines, the principal 
collections of dipterocarps in the Islands were those of Cuming, Vidal, 
and Warburg. It seems to me advisable to give here a list of these 
collections, so far as they are known and my identifications for them. 
PHILIPPINE DIPTEROCARPS COLLECTED BY CUMING. 
880 
Shorea eximia Miq. 
Albay. 
881 
Dipterocarpus sp. 
Albay. 
882 
Anisoptera thurifera (Blanco) Blume 
Albay. 
883 
Shorea squamata Dyer 
Albay. 
884 
Shorea balangeran (Korth.) Dyer 
Albay. 
892 
Shorea squamata Dyer 
Albay. 
1073 
Dipterocarpus grandiflorus Blanco 
Albay. 
DIPTEROCARPS COLLECTED 
BY WARBURG. 
14431 
Dipterocarpus pilosus Roxb. 
Davao, Mindanao. 
12399 
Shorea warburgii Gilg 
North Luzon. 
s. n. 
Parashorea plicata Brandis 
Davao, Mindanao. 
13430 
Vatica mangachapoi Blanco 
Candelaria, Zambales. 
