182 The Philippine Journal of Science ms 
mm longa. Stylopodio vix constricto, 3.5 mm longo. Stylis 0.4 
mm longis. 
A large tree. Leaves glabrous or nearly so, chartaceous, 
oblong-elliptic, 11.5 to 14.5 cm long, 5.7 to 7 cm wide; secondary 
veins about 20 pairs, in the lower half of the leaf with a number 
of short intermediate veins ; tertiary veins very prominent, retic- 
ulate. Secondary veins anastomosing near the margin, which 
is entire and slightly inrolled. Petiole 18 to 20 mm long. 
Flower clusters paniculate, apparently terminal and erect. 
Flowers white. Small branches of inflorescence stellate-pubes- 
cent. Pedicels 1 to 2 mm long, slender. Flowers spreading, 
about 1.5 cm in diameter. Calyx segments valvate, lanceolate, 
acute, pubescent on both surfaces, 3 mm long and 2 mm wide 
at the base. Petals oblong or obovate, 10 mm long, 6 mm wide. 
Stamens 25 to 30, filaments short, connective with very long 
appendage, 4 to 5 times as long as anther cells. Filaments about 
0.3 mm long, anther cells 0.3 to 0.6 mm long, connective 2 to 
2.5 mm long. Inner pair of anther cells much smaller than the 
outer. Stylopodium very large, almost cylindric, somewhat con- 
stricted just above the base and tapering at the top, about 3.5 
mm long and 1.5 mm in diameter, deeply ridged, crowned by 
three short, slender styles, each about 0.4 mm long. Stylopodium 
pubescent for its whole length, very distinct in appearance from 
that of other species examined. 
Mindanao, Zamboanga, For. Bur. 21899 Villamil, May 19, 1914 (type). 
For. Bur. 9371 and 9135 Whitford & Hutchinson, also collected in Zam- 
boanga Province, belong here, as does For. Bur. 23833 Villamil, collected 
in the same neighborhood as the type in May 1914. For Bur. 25937 Cortes, 
from Samar, June, 1916, seems also to belong here. 
3. HOPE A Roxburgh 
This genus shows a very large percentage of endemism. Of the sixty- 
five species known in the genus, thirteen are found in the Philippines. Of 
these but three Hopea ovalifolia Boerl., West Borneo, H. pierrei Hance, 
and H. odorata Roxb., are known outside the Archipelago. 
Key to the Philippine species of Hopea. 
a 1 . Secondary veins few and prominent. 
b 1 . Leaves narrowly oblong, unilaterally unsymmetrical. 
c. 1 Leaves 10 to 15 cm long, 2.2 to 7 cm wide; calyx-wings less than 
8 cm long. 
d 1 . Stipules long, semipersistent; calyx-wings 6 to 7.5 cm long. 
3. H. philippinensis. 
d 2 . Stipules short; calyx-wings 3.5 to 4.3 cm long.. 1. H. basilanica. 
c 1 . Leaves larger; calyx- wings 8 cm or more in length. 
2. H. mindanensis. 
