342 
ROBINSON. 
RHAMNACEAE. 
RHAMNUS L. 
Rhamnus philippinensis sp. nov. 
Rhamnus formosana C. B. Rob. in Philip. Journ. Sci. 3 (1908) Bot. 201, non 
Matsum. in Bot. Mag. Tokyo 12 (1898) 22. 
Frutex, R. formosanae similis, sed differt calyce fmctifero truncato, 
floribus majoribus, foliis crassioribus, latioribus, crenatis, et venis mino- 
ribus. 
Flowers polygamous, forming axillary or terminal few-flowered leafy 
cymes, borne on pedicels 1.8 to 3.5 mm long; bracteoles linear, acute, 1.5 
mm long : calyx eampanulate, 2.2 to 2.8 mm long, divided for over half 
its length into 5 broadly lanceolate to broadly ovate obtusely acuminate 
lobes, slightly pilose on the back, the inner surface of the lobes keeled; 
petals 5, inserted on the rim of the calyx-tube, elliptic, oblong, or oval, 
about 0.6 mm long, rounded at the apex, narrowed and with short claws 
at the base; stamens 5 or none, when present inserted with the petals 
and opposite them, filaments 0.2 mm long, anthers 0.3 to 0.4 mm long; 
disk lining the tube of the calyx; ovary sessile, subglobose, 0.8 mm 
long, 1 mm in diameter, 3-celled; styles 2- or 3-cleft, nearly 1 mm 
long : fruiting calyx truncate at the apex, slightly cupular or flattened, 
when viewed from below or above very obtusely 5-angled, less than 4 mm 
in diameter ; fruit purple, globose or subglobose, up to 8 mm in diameter, 
when mature (and dried), strongly 3-grooved with 3 shallower interven- 
ing grooves; nutlets usually 2, more rarely 1 or 3, 6.5 to 7.5 mm long, 
4.5 mm wide, 1-celled, 1-seeded; seeds about 6.5 mm long, testa brownish. 
A shrub 2.5 to 3 m high, the bark of the ultimate branches light- 
brown to dark-brown, striate, with numerous somewhat conspicuous 
lenticels, shortly pilose on the branches, branchlets, petioles, veins of the 
under surface of the leaves, stipules, and branches of the inflorescence: 
leaves subopposite or well alternate, the petioles 6 to 20 mm long, the 
lamina rigidly chartaceous, oval or suborbicular, rarely oblong, often of 
two fairly definite types on the same plant, the one usually 9 to 10 cm 
long, 5 to 6.5 cm wide, the other 3.5 to 5.5 cm long, 2.5 to 4 cm wide, 
but some of either type larger or smaller than the figures given, truncate 
or subcordate at the base, crenate on the margins, somewhat abruptly 
acuminate and mucronate at the apex; pinnately veined, with 4 to 6 
pairs on each side, well arched ; stipules linear-lanceolate, acute, caducous, 
2.5 mm long. 
Luzon, with no further locality, Loher 331 : Subprovince of Bontoc, Gaddac, 
Vanoverhergh 132; Bauco, Bur. Sci. 1005 Ramos: Subprovinee of Benguet, Baguio, 
Elmer 6319, Merrill 1101, Williams 1121 (type), For. Bur. 4813 Curran: Prov- 
ince of Nueva Vizcaya or Pangasinan, Imogen-Nozo trail, For. Bur. 15841 Merritt : 
Province of Rizal, Montalban, Loher 5822: Province of Tayabas, Mount Banajao. 
Whitford s. n. 
