XIII, C, 1 
Merrill: Philippine Plants, XIII 
41 
orbicular, about 1 cm in diameter. Capsules turbinate, some- 
what unequally 3-winged, about 1.5 cm long and 2 cm wide, 
the apex truncate or subtruncate, narrowed below to the sub- 
acute base. 
Luzon, Tayabas Province, Mount Binuang', Bur. Set. 28813 Ramos & 
Edano, May 11, 1917, climbing on tree trunks in damp forests near the 
summit of the mountain, altitude apparently about 1,000 meters. 
This characteristic species, belonging in the group with Begonia aequata 
A. Gray, is most closely allied to Begonia wenzelii Merr., from which it is 
readily distinguished by its larger, differently shaped, longer petioled leaves 
and distinctly larger capsules. 
BEGONIA CAUBATA sp. nov. 
Herba scandens, glabra, usque ad 3 m longa ; foliis in siccitate 
membranaceis, longissime petiolatis, subolivaceis, nitidis, ovatis 
ad subellipticis vel oblongo-ellipticis, usque ad 20 cm longis, basi 
inaequilateraliter cordatis, apice tenuiter caudato-acuminatis, 
margine obscure undulatis et distanter denticulatis ; inflorescen- 
tiis 40 ad 50 cm longis, axillaribus, longe pedunculatis, dichoto- 
mis, laxis; floribus $ circiter 25 mm diametro; capsulis 2 cm 
longis et 3 cm latis, alis valde inaequalibus, 2 circiter 4 mm 
latis, ala tertia membranacea, circiter 2 cm lata. 
A glabrous scandent herb climbing on tree trunks to a height 
of 3 m, entirely glabrous, the stems 5 to 6 mm in diameter when 
dry, the internodes 4 to 6 cm long and with numerous roots. 
Leaves membranaceous, subolivaceous and shining when dry, 
ovate to subelliptic or oblong-elliptic, 14 to 20 cm long, 8 to 9 
cm wide, base somewhat inequilateral, prominently cordate, 
palmately 7- or 9-nerved, apex rather abruptly and slenderly 
caudate-acuminate, the acumen 1 to 2 cm long, margins slightly 
undulate or nearly entire, sometimes with widely scattered, 
small, obscure teeth, the lateral nerves above the base usually 
two on each side of the midrib; petioles stout, 10 to 17 cm long. 
Inflorescences axillary, the peduncles stout, glabrous, up to 40 
cm in length, the cymes dichotomous, lax, 15 cm wide or more. 
Staminate flowers pink, the sepals suborbicular, about 13 mm 
long, rounded. Capsules about 2 cm long, very unequally 3- 
winged, one wing membranaceous, about 2 cm wide, the other 
two about 4 mm wide. 
Luzon, Apayao Subprovince, Mount Sulu, Bur. Sci. 284H Fenix, May 
22, 1917, on rocky slopes in damp forests, altitude apparently above 800 
meters. 
This most characteristic species is readily recognized by its habit, its 
long-petioled, subentire, caudate-acuminate leaves, and its very long in- 
florescences. It apparently belongs in the same group as Begonia oxy- 
sperma A. DC., but is entirely different from that species in its vegetative 
