180 The Philippine Journal of Science ms 
base truncate, margin entire, 19 cm long, 11 to 12 cm wide, 
secondary nerves 18 pairs; tertiary nerves parallel and reticu- 
late, with stellate hairs; petiole 5 cm long. Young shoots and 
seedling leaves ferruginous-hairy exceedingly like the same 
parts in D. vernicifluus. Fruit much the size and shape of that 
of D. marginatus, but more constricted at the top and with ridges 
produced into membranaceous wings, as in D. grandiflorus 
Blanco. 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, Bataan Province, Mount Mariveles, For. Bur. 12395 Curran & 
Merritt, August 1908 (type.) The type consists of three mature fruits, 
two young seedlings and one adult leaf, picked up under the parent tree. 
There has been but the one collection. As always, where the material is 
picked up under the tree, there is question of the accuracy of the diagnosis. 
However, the collectors were very careful and it has seemed desirable to 
give this collection a name. In 1911 6 I published a note concerning this 
apparently distinct form. 
17. DIPTEROCARPUS ORBICULARIS sp. nov. 
Arbor magna. Foliis suborbicularis vel obovatis, 9 ad 22 cm 
longis, 6 ad 11 cm latis, acuminatis, basi cuneatis vel rotundatis; 
nervis secondariis 9 ad 12 ; nervis tertiariis parallelis vel reticu- 
latis ; pagina superiore glabra, inferiore pilosa. Fructus alatus, 
alae membranaceae. 
A large tree with brownish tomentum on twigs, petioles and 
underside of leaves. Leaves mostly suborbicular, some obovate, 
9 to 12 cm long, 6 to 11 cm wide, with crenulate margins; apex 
shortly and very bluntly acuminate; base rounded or cuneate. 
Secondary nerves 9 to 12 pairs ; tertiary veins parallel and reticu- 
late. Petioles 2.5 to 3.5 cm long. Twigs, buds, petioles, and 
margins of leaves densely clothed with long pilose hairs. Upper 
side of leaf glabrous, except for a few scattered hairs along the 
veins. Lower surface very thickly covered with large stellate 
hairs, many of which are set on the tertiary veins. The second- 
ary veins and midvein are clothed, for the most part, with pilose 
hairs. The secondary veins unite near the margin with a fine 
intramarginal vein, which is very much the same size as the 
tertiary veins and united with them. Fruit (immature) with 
membranous wings as in D. grandiflorus Blanco. 
Luzon, Camarines Province, For. Bur. 21719 Penas, Soriano and 
Abellanosa, April 26, 1914 (type). 
This form differs from all other known species of the genus by the 
orbicular or nearly orbicular leaves. 
There are found in the collections also the following sheets, which were 
° Philip. Journ. Sci. 6 (1911) Bot. 253, t. 38. 
