260 FOXWORTHY. 
KEY TO PHILIPPINE SPECIKS OF IIOPKA. 
a. Secondary nerves few and prominent, 
b. Leaves narrowly oblon*,'. 
c. Leaves bilaterally symmetrical or nearly so, 2-3 cm wide.. 5. H, sp. (Naric) 
ec. Leaves unilaterally unsymnietrical. 
d. Leaves 10 to L5 cm long, 2.2 to 7 cm wide; fruit less than 8 cm long. 
e. Stipule-; Vmg, semipersistent ; fruit C.5 to 7.5 cm long. 
3. H. philippinensis 
ee. Stipules short, fruit 3.5 to 4.3 cm long 1. H. hasUan'wa 
dd. Leaves larger, fruit 8 cm or more in length 2. H. mindanensis 
bb. Leaves not narrowly oblong. ^ 
c. Leaves broad, elliptic-oval 7. H. ovalifoJia 
ec. Leaves lanceolate. 
d. Leaves 3 to G cm long, with few (5 to 7} pairs of secondary nerves. 
6. H. sp. (Gyam) 
dd. Leaves larger. 
e. Leaves long-acuminate, usually without domatia 8. H. acuminata 
ee. Leaves not long-acuminate, doinatia prominent 4. H. pJagata 
aa. Secondary nerves not distant; leaves coriaceous, glabrous, with numerous in- 
distinct and almost parallel nei-ves. 
b. Fruit more than 1 cm long 11- ^- '^P* 
bb. Fruit less than 1 cm long. 
c. Fruit reddish -brown, leaves with domatia 9- ". pterrei 
cc. Fruit greenish, leaves without domatia 1*^- ^- ^P' 
Sect. I. EuHorEA. Secondary nerves conspicuous, not approximate, 
not more tlian 20 pairs. Stamens 15/sometime« 12 to 15. Stylopodium 
always large. 
It seems that most of our species belong in this section. Two undeter- 
mined species are placed here at a venture, it seeming more probable that 
they Avill ^o here than in the section Petalandra. 
I, Hopea basilanica sp. nov. Plate XLII. 
Arbor magna ; foliis chartaceis, anguste oblongis vel ellipticis, glabris, 
supra nitidis, 10 ad 15 cm longis, 2.2 ad 4.8 cm latis, brcvissime caudato- 
aeuminatis, basi paullo obliquis, obtusis, utriuquo glabciTimis, costa media 
utrinque nervis lateralibus subtus prominentibus; petiolo brevissnno; 
paniculis brevibus terminalibus vel lateralibus; floribus ? 
fructu majusculo, calyce accreto cincto; calyeis fructifcri lobi aucti 3.5 
ad 4.3 cm longi, latitudine fere 10 ad 15 mm. 
Large tree 18 m tall, with thick, black, furrowed bark, like that of 
H. acuminata. Leaves chartaceous, narrowly oblong or elliptic, glabrous, 
shining above, 10 to 15 cm long, 2.2 to 4.8 em wide. Apex acuminate, 
tapering and unsynmietrical at base, the part above the midrib being the 
larger. Petiole dark-colored and wi-inkled, when dry. Midrib slightly 
pubescent above; secondary nones 10 to 12 pairs, ascending and bent up- 
ward at the margin of the leaf. Domatia in the axils of at least the lowest 
pairs of veins. Tertiary veins parallel and reticulate. Inflorescence 
