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 
Pachynocarpus and DryobalanopSj 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-sccars not encircling the twigs; leaves with finely crowded, parallel 
secondary nerves, coriaceous DryohaJanops 
aa. Fruit with less than 5 long wings, 
b. Long wings 3. 
c. Secondary nerves close and numerous 5. Chorea 
ec. 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. Dipt erocar pus 
ee. Stipule-scars not encircling twig; 18-24 resin-canals in circum- 
ference of pith 2. Anisopiera 
AA. Calyx-wingg 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 Cmning, Yidal, 
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 Dipteroearpus sp. Albay. 
■882 Anisoptera thurifera (Blanco) Blume Albay. 
883 Shorea squamata Dyer All^^y. 
884 Shorea balangeran (Korth.) Dyer Albay. 
892 Shorea squamata Dyer Albay. 
1073 Dipterocarpus grandiflorus Blanco Albay. 
DlPTEEOCARPS COLLECTED BY WARHLTRG. 
14431 Dipterocarpus pilosus Eoxb. Davao, Mindanao. 
12399 Shorea warburgii Gilg North Luzon. 
8. n. Parashorea plicata Brandis Davuo, Mindanao. 
13430 Vatica mangachapoi Blanco Candelaria, Zanibales. 
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