578 
Philippine Journal of Science 
1920 
Bur. 1991 Ahern’s collector, Merrill Phil. PI. 2013: Laguna 
Province, Mount Maquiling, Los Banos, For. Bur. 11676, 19808 
Whitford, For. Bur. 11919 Tamesis, For. Bur. 22955 Cahjcosa, 
For. Bur. 13232 Curran. Mindoro, For. Bur. 9913 Merritt. 
Palawan, Brooks Point, Elmer 12630. Ticao, For. Bur. 1080 
Clark. Bugas Grande, Bur. Sci. 35078 Ramos & Pascasio. 
Mindanao, Davao Province, For. Bur. 27587 De Mesa. 
In forested ravines and on forested slopes at low altitudes. 
Endemic. 
EUPHORBIA Linnaeus 
EUPHORBIA LUZONIENSIS sp. nov. § Chamaesycae. 
Herba perennis, tenuibus, prostratis, e radicis lignosis, ram- 
ulis parce pubescentibus ; foliis orbicularis ad orbiculari-ovatis, 
subcoriaceis, integris vel obscure crenulatis, apice late rotunda- 
tis, basi inaequilateralibus, usque ad 8 mm longis; involucris 
numerosis 1.5 mm longis cymosis, cymis 1 ad 1.5 cm longis, 
foliis depauperatis 1 ad 3 mm longis instructis, glandulis reni- 
formibus, integris; capsulis ovoideis, 1.5 mm longis, 3-angu- 
latis, leviter pubescentibus. 
A slender, prostrate, dichotomously branched, perennial herb 
from thick woody roots, the branchlets very slightly pubescent, 
the woody roots up to 8 mm in diameter. Branches 1 mm in 
diameter or less, the internodes up to 1.5 cm in length. Leaves 
orbicular to orbicular-ovate, 5 to 8 mm long, subcoriaceous, 
entire or very obscurely crenulate, apex broadly rounded, base 
distinctly inequilateral, more or less oblique on one side, 
sometimes shallowly laterally cordate, olivaceous when dry, the 
upper surface glabrous, the lower when young often slightly 
pubescent, soon becoming glabrous ; lateral nerves 3 or 4 on each 
side of the midrib, faint, obscure, the reticulations close; pet- 
ioles 1 to 2 mm long; stipules broadly ovate, thin, denticulate, 
sometimes cleft, 0.5 to 1 mm long. Involucres rather numerous, 
forming terminal leafy cymes 1 to 1.5 cm long and about as 
wide, the leaves associated with the involucres in the inflores- 
cence similar to the normal ones but very much smaller, 1 to 
3 mm long. Individual involucres cup-shaped, very slightly 
pubescent, about 1.5 mm long, their pedicels 1 to 1.5 mm long; 
bracteoles thin, short, somewhat ciliate; glands renifomi, about 
0.6 mm wide, the appendages entire. Ovary slightly pubescent; 
styles cleft about one-third to the base, the arms short, some- 
what thickened. Capsule ovoid, about 1.5 mm long, very slightly 
pubescent, 3-angled. Seeds slightly rugose, about 1 mm long. 
