xm, c, 3 Foxworthy : Philippine Dipterocarpaceae, 11 179 
considered as sometimes in the section Angulati and sometimes in the 
section Alati. 
Luzon: Tayabas, Camarines, and Albay Provinces. Negkos. Basilan. 
14. DIPTEROCARPUS BASILANICUS sp. nov. 
Arbor magna. Folia chartacea, elliptica, apice acuminatis, 
basi cuneatis, nervis secundariis utrinque 13, tertiariis plurimis, 
parallelis et reticulatis, obscuris, 6 ad 11 cm longa, 2 ad 5.5 cm 
lata, margine undulatis, subtus pubescentibus. Floribus ignotis. 
Fructus 5-angulatis, 15 ad 18 mm longis, aliis late linearibus, 
oblongus e basi 3-nervis, 7 ad 9 cm longis, 14 ad 21 mm latis. 
A tree 40 m tall and 50 cm in diameter. Leaves and twigs 
finer than in most Philippine species. Leaves chartaceous, ellip- 
tic, with acuminate apex and cuneate base. Under side of leaves 
and young twigs pubescent. Terminal buds clothed with long 
pilose, silky hairs. Secondary nerves about 13. Leaves 6 to 
11 cm lorig and 2 to 5.5 cm wide. Fruit 5-angled, 15 to 18 
mm long and of about the same diameter. Angles of fruit more 
or less distinctly developed into wings, but thick and hard. 
Basilan, Mount Basilan, at 500 to 600 meters elevation, For. Bur. 
18895 Miranda, August 27, 1912 (type), For. Bur. 18896 Miranda, Bur. 
Sci. 16128 Reillo, August, 1912. 
The wood is said to be harder than that of ordinary apitong and is 
used for general construction. 
This species suggests a form referred to by King in Journ. As. Soc. 
Beng. 62 2 (1893) 99: “A Perak species (Herb. Scortechini mixed with 
No. 1478) represented by fruits something like those of D. fagineus 
Vesque, but with the calyx-tube winged, not angled.” It is evident that 
the relationship here must be very close, but identity is doubtful. This 
species is our only representative of the § Angulati. It seems noteworthy 
in that section in that the angles are developed until they resemble wings. 
It is most closely related to Dipterocarpus fagineus Vesque, of the Malay 
Peninsula and Borneo, but differs from that species in having slightly 
smaller fruits, which are more sharply angled and with more scantily 
developed venation in the fruit wings. 
15. DIPTEROCARPUS GRAN D1 FLORUS Blanco. Apitong. 
Luzon: Cagayan, Isabela, Ilocos Sur, Abra, Benguet, Pangasinan, 
Nueva Ecija, Zambales, Bataan, Bulacan, Rizal, Laguna, Tayabas, Cama- 
rines, Albay. Mindoro. Sibuyan. Panay, Capiz. Necros. Samar. Bi- 
liran. Palawan. Mindanao: Agusan, Misamis. 
16. DIPTEROCARPUS PH I LI PPI N ENSIS sp. nov. 
Arbor magna. Fructus alatus D. marginato Korth. similis sed 
minoribus. 
A large tree 30 m tall and 75 cm in diameter. Fruit winged, 
leaves of seedlings similar to those of D. vernicifluus Blanco. 
Mature leaf (picked up under the tree) ovate-lanceolate, acute, 
