THE FLORA OF MOUNT PULOG. 
379 
ASCLEPIADACEiE. 
SARCOSTEMMA R. Br. 
1. S. brunonianum W. & A. in Wight Contrib. (1834) 59; Ic. t. 1282. 
Habitat not given, probably in stream depressions in the pine region, G. M. Z. 
16035 ; also represented by two other collections from Benguet Province, Bur. Sci. 
3 4 87 Mearns, Elmer 5991. 
This species has been identified by comparison with descriptions and figures 
only, and I can detect no characters by which it can be separated from the Indian 
form; Deccan Peninsula, India, ascending to 1,300 m in the Nilgherry Mountains, 
and Ceylon. 
TYLOPHORA R. Br. 
1. T. sp. 
Pine region below 1,300 m, C. M. Z. 16093. 
Probably an undescribefl species, apparently allied to Tylophora elmeri Schltr. 
HOYA R. Br. 
1. H. cumingiana Dene, in DC. Prodr. 8 (1844) 636. 
On boulders in stream depressions in the pine region, altitude 1,200 m, C. M. Z. 
16094, Merrill 6352. 
Endemic; very closely allied to H. dens-ifolia Turcz., of Java, and the latter 
species perhaps not specifically distinct. See Backer Ie. Bogor. 3 (1908) 157, 
t. 257. 
CONVOLVULACEiE. 
IPOMOEA Linn. 
1. I. batatas (Linn.) Poir. in Lam. Eneyel. 6 (1804) 14. 
Extensively cultivated by the Igorots throughout the area below the lower 
limits of the mossy forest, C. M. Z. 18158. 
Tropical and subtemperate parts of the world; extensively cultivated. The 
sweet potato. 
BORAGINACE^E; 
EH RET I A Linn. 
1. E. philippinensis A. DC.. Prodr. 9 (1845) 504. 
In stream depressions, pine region, altitude about 1,500 m, C. M. Z. 18198. 
An endemic species widely distributed in the Philippines at low and medium 
altitudes; perhaps not specifically distinct from the widely distributed Indo- 
Malayan-Australian E. laevis Roxb. 
TOURNEFORTIA Linn. 
1. T. horsfieldii Miq. FI. Ind. Bat. 2 (1857) 927. 
In the pine region, altitude about 1,500 m, C. M. Z. 16103. 
At medium altitudes in Luzon; Malaya. 
CYNOGLOSSUM Tourn. 
1. C. furcatum Wall, in Roxb. FI. Ind. 2 (1824) 6. 
In stream depressions, pine region, altitude about 1,500 m, G. M. Z. 16332. 
In the Philippines known only from the Benguet-Lepanto region; Afghanistan 
to India, Ceylon, China, and Japan. 
