ON THE FLORA OF BORNEO. 95 



petiolulis interioribus 1-foliolatis, lateralibus 2-foliolatis, folio- 

 lis membranaceis, oblongo-ellipticis vel oblongis, usque ad 6 

 cm. longis, apice acuminatis apieulatisque, basi acutis, margine 

 leviter undulatis, distanter spinuloso-denticulatis, nervis utrin- 

 que 5 vel 6 ; infiorescentiis longe tenuiterque pedunculatis, 

 spicis circiter 15, circiter 1 cm. longis, patulis; floribus parvis, 

 4-meris, petalis junioribus circiter 1 mm. longis. 



A very slender, scandent plant, the branches, branchlets, 

 inflorescences, petioles petiolules and the midrib and nerves 

 on the lower surface of the leaves densely rusty or rubiginous- 

 lanate, the branches very slender, about 1 mm. in diameter. 

 Leaves palmate-pedate 5-foliolate, their petioles slender, 2 to 

 3 cm. long, the stipules ovate to oblong-ovate, slightly pubes- 

 cent, about 3 mm. long. Leaflets membranaceous, oblong- 

 elliptic to oblong, brownish when dry, the upper surface quite 

 glabrous, 2 to 6 cm. long, 1 to 2.5 cm. wide, the central ones 

 larger than the lateral, the interior on a 3 to 4 mm. long, 

 petiolule, the two lateral ones on each side subsessile on 4 to 

 6 mm. long, branchlets of the common petiole, the central 

 leaflet equilateral, the others inequilateral, apex acuminate 

 and apiculate, base usually acute, margins distantly spinulose- 

 denticulate by the excurrent lateral nerves, slightly undulate; 

 lateral nerves 5 or 6, slender, densely brown-tomentose on the 

 lower surface. Inflorescences on a very slender peduncle which 

 attains a length of at least 10 cm., 1 mm. in diameter or less, 

 composed of about 15, slender, spreading, 1 cm. long spikes 

 arranged in the upper 5 cm. of the inflorescence, the peduncle 

 and common rachis densely rubiginous-villous, the rachises 

 of the spikes minutely grayish-pubescent or puberulent. 

 Flowers small, 12 to 20 on each spike, 4- rarely 5-merous, 

 sessile, their bracteoles ovate-lanceolate, acuminate, 0.5 mm. 

 long. Calyx cup-shaped, glabrous, 0.8 mm. long, with very 

 obscure, broadly rounded lobes. Petals 4, rarely 5, in bud 

 oblong-elliptic, about 1 mm. long. Anthers oblong. Ovary 

 glabrous. 



Sarawak, without definite locality, Native collector 251 

 (Bur. Sci.). 



A characteristic species, readily recognizable by its very 

 slender stems, its small, membranaceous leaflets which are 

 glabrous on the upper surface and rubiginous-pubescent on 

 the nerves and midrib beneath, and by its very slender, small, 

 inflorescences. Its alliance is apparently with Ampelocissus 

 motleyi, Planch. 



Pterisanthes, Blume. 



Pterisanthes parvifolia, sp. nov. 



Frutex scandens, tenuis, glaber; foliis simplicibus, ob- 

 longis, usque ad 7 cm. longis, chartaceis, basi cordatis, apice 



R. A. Soc, No. 76, 1917. 



