266 FOXWORTHY. 
10. Hopea sp. 
A form wliieh dirfers from H. pierrei in having nsiially more uniform^ 
smaller and narrowei* leaves and green, short-stalked fruit. The leaves 
seem to be without domatia. ^ 
It is possible that some of the sterile material -wliich has been referred 
to H, picrreij may belong to this species and the next. 
F- 
A single collection from the Island of Sibuyan, Elmer 12011, March 1910, in 
fruit. 
L 
11. Hopea sp. 
This differs from //, pierrei in having a much larger fruit, which is 
sometime glutinous. 
SiBUYAN, Elmer 122S9, April 1910, in fruit. Luzon, Province of La Laguna, 
Phil PI 307 Jiamos, August 1910, in fruit. 
4. PENTACME A. DC. 
Sepals strongly imbricate. Petals broad, spreading. Stamens 15. 
Anthers oblong, on short broad filaments. Anther-cells equal, each pro- 
longed into a short appendix; the connective also prolonged, so that each 
anther has 5 apical appendages. Ovary glabrous, prolonged into a conical 
stylopodium; style filiform, glabrous. Stigma obtuse, indistinctly 3- 
toothed. The three outer segments of frui ting-calyx much larger than 
the others, narrowed into a stalk, but expanding into a broad base, which 
is adpressed to the lower portion of the fruit but does not enclose it. 
Four species known, two from the eastern Indian peninsula and two 
from the Philippine Islands. 
The wood is the least durable of any of our dipterocarps, but is con- 
siderably u^ed because it is so abundant and readily worked and it is 
very satisfactory for purposes of temporary construction. There is quite 
a little resin present in the wood, but so far as I know, it is not used 
commercially. 
Pith with 12 to 25 resin-canals. Petiole with a semicircle of 7 to 9 
vascular bundles, cacli with one resin-canal; 3 resin-canals in the central 
mass, 
1. Pentacme contorta (Vidal) Merrill & Rolfe in Phil. Journ. Sci. 3 (19(^) 
Bot. 115; Merritt in Philip. Bur. For. Bull. 8 (1908) 48; Whitford in Philip- 
Journ. Sci. 4 (1910) Bot. 703, Philip. Bur. For. Bull. 10= (1911) 62, pU 56, 57; 
Foxworthy in Philip. Journ. Sci. 4 (1909) Bot. 511, 510. 
Skorea contorta Vidal Sinopsis Atlas (1883) xv, t, 15, f. E; Rev. Pi. Va^(C. 
Filip. (ISSG) 88; Brandis in Jouni. Linn. Soc. Bot. 31 (189.-)) 88; Merr. jn 
Phil. Journ. Sci. 1 (1906) Suppl. 98; Foxworthy in Philip. Journ. Sci. 2 (1907) 
Bot. 386. 
Pentacme paucinervis Brandis in Journ. Linn. Soq. Bot. 31 (1895) 73; ^Merrill 
&. Rolfe in Phil. Journ. Sci. 1. c. 
