PHILIPPINE DIPTEROCARPACEAE. 
253 
Native names: apitong (Tag.), anahauon (B.), balao (Tag.), damalalian 
(Cag.), duko (N. Luz. ) , kamuyao (V., II.), malapaho (Tag.), pagsahingin (Tag.), 
pamalalian (Cag.), pamantuling (Pang., II.), panao (Tag.). 
Distribution: Penang; Malay Peninsula, Perak, Malacca, Johore; Bangka; 
Borneo; the Philippines. 
11. Dipterocarpus sp. Plate XXXVIII. 
Large tree, 30 m high, 75 cm in diameter. Mature leaves ovate- 
lanceolate, acute, base truncate, margin entire, 19 cm long, 11 to 12 cm 
wide ; secondary nerves 18 pairs ; tertiary nerves parallel and reticulate, 
with stellate hairs; petiole 5 cm long. Young shoots and seedling- 
leaves ferruginous, hairy, exceedingly like the same parts in D. vernici- 
fluus. Fruit much the size and shape of that of D. marginatm but more 
constricted at the top and with the ridges produced into membranaceous 
wings, as in D. grandiflorus. Fruit 3 to 3.5 cm long and 2 to 2.5 cm 
in diameter, the two long wings 15 to 17 cm long and 25 to 28 mm wide. 
Luzon, Province of Bataan, Limay, For. Bur. 12395 Curran & Merritt, 
Aug. 1908. 
It has been suggested that this form might be a natural hybrid of D. gran- 
diflorus and D. vernicifluus. I think it a new species, but the material is not 
in condition to warrant describing it as such. The material consists of two 
young seedlings, three mature fruits and one adult leaf, picked up under the tree. 
Dryobalanops Gaertn. 
According to Yidal, “Sinopsis de plantas lenosas de Filipinas,” p. 48, 
Dryobalanops aromatica Gaertn. f. is probably found on Balabac and other 
Philippine Islands. Blanco’ in his second edition, p. 315, says that, 
according to some authors, this genus occurs in the Philippines. 
I have been unable to find any definite record of the finding of 
Dryobalanops in the islands and so it is not considered here. It seems 
reasonable to suppose that it may some day be found in the southern part 
of the Archipelago, where there seem to be a good many Bornean forms. 
2. ANISOPTERA Korthals. 
Always large trees, with good clear length of bole, often gregarious. 
Bark thick, gray or blackish, coarsely furrowed and fissured. Wood 
yellowish or pinkish, without deposits of hard resin. Freshly cut stumps 
flowing a considerable quantity of a sticky wood oil. Leaves with a 
limited number of very prominent secondary nerves (14 to 20), usually 
chartaceous or thinly coriaceous. Stipules small, early deciduous. 
Flowers numerous, in lax panicles. Calyx-tube enclosing the fruit, which 
is connate with it ; 2 lobes expanding into long wings which have three or 
four principal veins and numerous prominent transverse veins. Stamens 
20 to 35; connective prolonged into a long point. Ovary with a large 
fleshy stylopodium, style short, with 3 stigmas. Young shoots, inflores- 
cence, and underside of leaves clothed with fascicles of stellate hairs and 
