38 The Philippine Journal of Science i9is 
it and from the other Philippine species of the section Myriantheia by its 
indumentum. In its general appearance and its indumentum it resembles 
H. barandae Vid., but the latter belongs in the section Blackwellia. 
BEGONIACEAE 
BEGONIA Linnaeus 
BEGONIA CASTILLO! sp. nov. § Diploclinium. 
Herba parva, parcissime et longe ciliatis, repens, caulibus 
usque ad 10 cm longis stipulis multis brunneis oblongo-lanceolatis 
acuminatis instructis; foliis suborbicularibus, aequilateralibus 
vel leviter inaequilateralibus, late rotundatis, basi cordatis, 3 
ad 5 cm longis, margine integris vel irregulariter denticulatis, 
ciliatis ; inflorescentiis tenuibus, paucifloris, 10 ad 12 cm longis ; 
capsulis circiter 1 cm longis, 1 ad 1.4 cm latis, inaequaliter 3- 
alatis, suborbicularibus vel apice subtruncatis. 
A small herb, the stems up to 10 cm long, creeping, covered 
with numerous, brown, oblong to lanceolate, slenderly acuminate 
stipules which are up to 1 cm in length and above usually 
prominently long-ciliate. Leaves membranaceous, olivaceous- 
brownish when dry, suborbicular, 3 to 5 cm in diameter, equila- 
teral or somewhat inequilateral, apex broadly rounded, base pro- 
minently cordate, the lobes broad, rounded, equal or subeqUal, 
9-nerved, the upper surface glabrous, the lower glabrous or with 
very few hairs on the nerves, the margins entire or denticulate, 
sparingly ciliate with long brown hairs; petioles slender, 2.5 to 
5 cm long, the younger ones ciliate with long, slender, brown 
hairs. Inflorescences slender, few-flowered, 10 to 12 cm long, 
glabrous or nearly so. Capsules unequally 3-winged, about 1 
cm long, 1 to 1.5 cm wide, suborbicular, or the upper side of the 
broad wing truncate, this wing 7 to 9 mm wide, the other two 
about 2 mm wide. 
Luzon, Cagayan Province, Callao, near Pena Blanca, Bur. Sci. 22723 
Castillo, April 23, 1915, on cliffs along the river, altitude about 100 meters. 
The general alliance of this species is with Begonia nigritarum Steud., 
to which, however, it is not closely allied. Its distinguishing characters 
are its small, suborbicular, equilateral or nearly equilateral leaves. 
BEGONIA TAYABENSIS sp. nov. § Diploclinium. 
Herba subglabra, caulibus circiter 1 cm diametro, stipulis 
deciduis; foliis longe petiolatis, perspicue peltatis, suboblique 
ovatis ad oblongo-ovatis, usque ad 20 cm longis, basi rotundatis, 
apice subacutis vel obtusis, margine subintegris, subtus valde 
reticulatis ; inflorescentiis longissime pedunculatis, 25 ad 35 cm 
longis, dichotomis, laxis, paucifloris; floribus S circiter 2 cm 
