THE FLORA OF MOUNT HA LOON. 
273 
ANONACE2E. 
UNONA Linn. f. 
Unona mindorensis Merrill n. sp. § Stenopetalum . 
Foliis oblongo-lanceolatis acuminatis 10 ad 17 cm. longis, basi acutis; 
pedunculis axi liar i bus solitariis ad 1.2 cm. longis; petalis 6, subaequa- 
libus, ovato-lanceolatis, acutis, 1.5 ad 1.7 cm. longis, pubescentibus ; 
ovulis 3 uniserialibus ; carpellis maturis ovatis, acutis, ad 1.5 cm. longis. 
A small tree about 6 m. high ; branches slender brownish gray, slightly 
pubescent, terete. Leaves submembranous, oblong lanceolate, 10 to 17 
cm. long, 2.5 to 4.5 cm. wide, the base acute, the apex gradually acumi- 
nate, dull above, somewhat paler and slightly shining beneath, glabrous 
or nearly so ; nerves abolit 9 on each side of the midrib, ascending, distinct 
beneath, the reticulations few, indistinct; petioles stout, rugose, 5 mm. 
long or less. Peduncles axillary, solitary, about 1.2 cm. long, slightly 
pubescent and with one or two small basal bracts. Flowers greenish- 
white. Sepals 3, pubescent, triangular ovate, acute, about 3.5 mm. long. 
Petals 6, free, spreading in flower, ovate-lanceolate, acute, pubescent, the 
outer three about 1.7 cm. long, 7 mm. wide, the inner three 1.5 cm. long, 
5 mm. wide. Stamens many, glabrous, 2 mm. long, the connectives 
truncate, overlapping. Ovaries about 12, densely hirsute, oblong, 3 mm. 
long; ovules 3, parietal in one row ; styles 1.5 mm. long. Carpels ovoid, 
about 1.5 cm. long, acute, narrowed below into a short stout stipe, brown 
when dry, slightly pubescent. 
In forests at 300 m. alt. (No. 5568). A closely related species is represented 
by No. 4060 Merrill, from the Baco River, near the base of Halcon, March, 1905. 
OXYMITRA Blume. 
Oxymitra sp. near O. glauca. Hk. f. et Th. 
In forests at 180 m. alt. (No. 5629). Specimens with fruit only, but undoubt- 
edly referable to this genus. 
PHAEANTHUS Hook. f. et Th. 
Phaeanthus cumingii Miq. FI. lnd. Bat. I 2 (1859) 51. 
In forests at 700 m. alt. (No. 5648). 
Widely distributed in the Philippines. Endemic. 
Phaeanthus acuminatus Merr. in Govt. Lab. Publ. 35 (1906) 11. 
In forests at 150 m. alt. (No. 4321 Merritt) June, 1906. 
Known only from Mindoro and Palawan. 
GONIOTHALAMUS Blume. 
Goniothalamus elmeri Merr. in Govt. Lab. Publ. 29 (1905) 13. 
In forests at 900 m. alt. (No. 4354 Merritt) June, 1906. 
Widely distributed in the Philippines. Endemic. 
