THE FLORA OF MOUNT HALCON. 
305 
green above, pale beneath, somewhat shining, glabrous throughout, base 
and apex acuminate ; nerves 15 to 20 on both sides of the midrib, very 
prominent and brownish beneath, spreading, anastomosing near the 
margins ; petiole 3 to 5 cm. long, the lamina somewhat decurrent-acumin- 
ate; stipules lanceolate-acuminate, about 3 mm. long. Cymes terminal, 
ferruginous puberulent, the peduncle 4 to 5 cm. long, the branches 4' cm. 
long or shorter. Calyx 2.5 to 3 mm. long, the teeth 5, short, acute. 
Corolla white, 8 mm. long, the tube cylindrical, slightly inflated below, 
G mm - long, the lobes 5, elliptical-oblong, obtuse, 2 mm. long. 
In humid forests at 150 m. alt. (No. 5628). 
A species characterized by its glabrous, long petioled leaves, the nerves sub- 
parallel, very numerous and prominent. 
Ophiorrhiza oblongifolia DC. Prodr. 4 (1830) 415. 
In forests at 1,200 m. alt. (No. 5496), small leaved form; at about the same 
altitude (No. 4385 Merritt) June, 1906, a large leaved form. 
Widely distributed in the Philippines. Endemic. 
ARGOSTEMMA Wall. 
Argostemma solaniflorum Elmer Leaflets Philip. Bot. 1 (1906) 2. 
In forests at 1,350 m. alt. (Nos. 6105, 6186) ; also collected by Merritt (Nos. 
4470, 4390). 
Previously known only from northern Luzon. 
UNCARIA Schreb. 
Uncaria philippinensis Elmer Leaflets Philip. Bot. (1906) 38. 
In thickets at 700 m. alt. (No, 5530). 
Previously known from Luzon and Mindoro. 
NAUCLEA Linn. 
Nauclea sp. 
In forests at 450 m. alt. (4337 Merritt ) June, 1906. Undeterminable, the 
material being very fragmentary and in poor condition. 
MUSSAENDA Linn. 
Mussaenda anisophylla Vidal Phanerog. Cuming. Philip. (1885.) 178. 
In thickets at 250 m. alt. (No. 4330 Merritt ) June, 1906. 
Apparently widely distributed in the Philippines. Endemic. 
UROPHYLLUM Wall. 
Urophyllum glabrum Jack ex Roxb. FI. Ind. ed. Carey, 2: 186. 
In forests at 300 m. alt. (No. 5603). 
From Burma through the Malayan Peninsula to the Malayan Archipelago. 
Urophyllum bataanense Elmer Leaflets Philip. Bot. (1906) 40; Merr. in 
Philip. Journ. Sci. 1 (1906) Suppl. 129. 
In forests at 1,500 m. alt. (Nos. 6144, 6179) ; also collected by Merritt as low 
as 450 m. alt. (Nos. 4318, 4339, 4389). 
Previously known only from Luzon. 
