140 The Philippine Journal of Science i»i« 



Negros, Barlin, For. Bur. 11217 Everett, April 21, 1908, reaching the 

 tops of tall trees, growing at an altitude of about 90 meters, locally known 

 as langingi. 



Well characterized by its ample, long-petioled, pedately 5- or 7-foliolate 

 leaves, its coarsely sinuate-serrate leaflets, its long-peduncled, pubescent 

 inflorescence, and its relatively large flowers. It resembles Tetrastigma 

 magnum Merr., of Luzon, but differs, among other characters, in its 

 pubescent inflorescence. 



TETRASTIGMA LAXUM sp. nov. 



Frutex glaber scandens, ramis ramulisque teretibus ; f oliis pal- 

 matim 3-foliolatis, foliolis coriaceis, in siccitate brunneis, ellip- 

 ticis vel ovato-ellipticis, 4 ad 7 cm longis, utrinque subaequaliter 

 angustatis, basi acutis, apice acute acuminatis apiculatisque, 

 margine supra denticulatis ; inflorescentiis oppositif oliis, laxis, 

 circiter 10 cm longis, longe pedunculatis, divaricato ramosis; 

 floribus $ 4-meris, in ramulis ultimis umbellatis, petalis glabris, 

 2 mm longis, apiculato-acuminatis. 



A scandent, entirely glabrous vine reaching a length of 

 20 m and a diameter of 12 cm, the branches and branchlets 

 slender, terete, brown, the branches sparingly lenticellate. Ten- 

 drils not seen. Leaves palmately 3-foliolate, their petioles 1.5 

 to 3 cm long; leaflets coriaceous, dark-brown when dry, slightly 

 shining, the lower surface a little paler than the upper, elliptic 

 to ovate-elliptic, subequally narrowed at both ends, 4 to 7 cm 

 long, 1.5 to 3 cm wide, the base acute, the apex rather promi- 

 nently and sharply acuminate, the acumen apiculate, the margins 

 in the upper one-half distantly and minutely denticulate ; lateral 

 nerves 4 or 5 on each side of the midrib, very obscure, the reti- 

 culations obsolete ; petiolules 6 to 15 mm long, those of the lateral 

 leaflets usually shorter than that of the middle one. Inflores- 

 cence slender, axillary, about 10 cm long, often wider than 

 long, slenderly peduncled, divaricately branched above the mid- 

 dle, lax, many-flowered, the flowers umbellately disposed on the 

 ultimate branchlets, 3 to 5 in each umbel, their pedicels 2 to 

 3 mm long. Male flowers: Calyx subtruncate or obscurely 4- 

 toothed ; petals 4, spreading, oblong, 2 mm long, distinctly cucul- 

 late at the apex, quite glabrous, not corniculate, but the apex 

 apiculate-acuminate ; filaments slender, 1 mm long; anthers 

 about 0.2 mm long, broader than long; disk prominent, glabrous, 

 obscurely 4-lobed. Female flowers and fruits not seen. 



Luzon, Province of Bataan, Lamao River, For. Bur. 2195 Borden 

 (type), For. Bur. 2510 Meyer, January, 1905, climbing on large trees in 

 dry forests and thickets, altitude 30 to 60 meters; the flowers fragrant, 

 pale-green. 



A species well characterized by its 3-foliolate leaves, the leaflets dark- 



