38 The Philijypine Jourmal of Science lais 



it and from the other Philippine species of the section Mynantheia by its 

 indumentum. In its general appearance and its indumentum it resembles 

 H. harandae Vid., but the latter belongs in the section Blackwellia. 



BEGONIACEAE 



BEGONIA Linnaeus 

 BEGONIA CASTILLOI 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 6 circiter 2 cm 



