ALABASTRA PHILIPPINENSIA, III. 
341 
pubescent, 3 mm long, the tube hemispheric, the 5 lobes not exceeding 
0.5 mm in length, rounded; petals 5, inserted on the margin of" the 
narrow annular disk, coriaceous, glabrous on the inner surface, hooded, 
valvate, 2 to 3.5 mm long; stamens 5, always more or less concealed by 
the dense pubescence of the ovary, the glabrous filaments wider at the 
base, anther-cells 2 , diverging at the base, together ovate, cordate; ovary 
hemispheric, 2 mm in diameter at the base; style simple for about 0.3 
mm, then forming 3 arms about 1 mm long, these having at their apices 
two very short divergent lobes: fruiting pedicels elongated, the calyx 
now 6 to 12 mm long, surrounding the swollen hypocarp and usually 
with grooves corresponding to those of the drupe, calyx-lobes persistent, 
not enlarged ; petals occasionally persistent, little or not elongated ; drupe 
densely ferruginous-pubescent or somewhat glabrescent, obovoid in out- 
line, 15 to 20 mm long, 20 to 25 mm wide at the apex, which is truncate 
along the margin and depressed in the middle, several ridges extending 
from base to apex of the drupe, commonly the narrowest of these con- 
tinued to the persistent base of the style, to which portions of the 
style-arms sometimes remain attached. 
A tree, 10 to 15 m high, its trunk 12 to 22.5 cm in diameter, the 
more or less angled branchlets covered with gray or blackish striate bark, 
the younger shoots ferruginous-pubescent or glabrescent with age : leaves 
alternate, simple, the petioles 1 to 2.5 cm long the lamina subcoriaceous 
or coriaceous, oblanceolate, eliiptic-oblanceolate, oblong-oblanceolate, or 
oval, 7.5 to 22 cm long, 3.5 to 8.5 cm wide, the base cuneate and decur- 
rent on the petiole, the margins entire or somewhat wavy, the apex 
abruptly contracted into an acumen 5 to 12 mm long; lateral veins on 
each side of the midrib 10 to 15, forming a distant submarginal vein, 
the secondary veins leaving the primary at about a right angle, all these 
and the finer reticulations conspicuous ; both surfaces glabrous, the under 
when dry somewhat brownish or paler than the shining olivaceous or 
bluish-green upper surface. 
Luzon, Province of Pampanga, Mount Arayat, For. Bur. 17669 Curran: Province 
of Rizal, Bosoboso, For. Bur. 3173 (type), 2133, 3363 Ahern’s collector, Merrill 
2654, Bur. Sci. 1507 Ramos; Antipolo, Merr. Dec. Phil. For. FI. 15 Ahern’s 
collector: Province of Bataan, Mount Mariveles, Ahern 7 46, Williams 580, For. 
Bur. 2388 Borden, For. Bur. 2422 Meyer: Province of Tayabas, Pagbilao, For. 
Bur. 10748 Curran. 
A collection in fruit from Cabadbaran, Butuan Subprovince, Mindanao, is 
also probably referable to O. ferruginea. The fruits are less pubescent, and the 
calyx is not persistent, the extreme apex of the fruit forms the usual cone within 
a depression, and shows traces of the styles, usually slightly separated. A 
section of the fruit shows 9 invaginations, the seed, attached beneath the narrow 
ridge already described, is better developed than in any of the Luzon material 
examined, spreading in superficial resemblance to a walnut into each of the 
cavities.. Flowering material will be necessary to a decision whether or not 
this should be positively referred to O. ferruginea. 
Local names: ligayao, ligaas. 
