XIII. c.i 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. Sci. 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 ivenzelii Merr., from which it is 

 readily distinguished by its larger, differently shaped, longer petioled leaves 

 and distinctly larger capsules. 



BEGONIA CAUDATA sp. nov. 



Herba scandens, glabra, usque ad 3 m longa ; f oliis 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 s 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. 28^14 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 



