21,6 Merrill: The Bornean Flora. 527 
3.5 mm long, arched, cohering by their apices, Androphore 
about 1.5 mm long, bearing a globose head of 10 anthers about 
1 mm in diameter. 
Sarawak, 1752 native collector. British North Borneo, Batu 
Lima, Agama 1001, October, 1920, Ramos 1487, 1728, 1725, 
October and November, 1920. In damp forests along streams 
at low altitudes. 
This species is strongly characterized by its rather long- 
petioled, nearly glabrous leaves and by the dense crown of 
stipules or stipulelike bracts which terminates the branchlets. 
STERCULIA MEMBRANACEA sp. nov. 
Frutex vix 1 m altus, partibus junioribus inflorescentiisque 
leviter pubescentibus, ramis ramulisque tenuibus; foliis oblongis, 
membranaceis, glabris, nitidis, olivaceis, 12 ad 20 cm longis, 
basi angustatis, acutis vel leviter obtusis, apice contractis et 
abrupte rostrato-acuminatis, nervis utrinque 8 ad 10; paniculis 
tenuissime pedunculatis, 7 ad 10 cm longis; floribus extus glabris, 
tenuiter pedicellatis, 5 ad 8 mm longis, lobis lineari-oblongis, 
arcuatis, coherentibus, tubo aequantibus. — : | 
_ A shrub, less than 1 m high according to the collector, the 
younger parts including the inflorescences slightly pubescent. 
Branches slender, terete, about 2 mm in diameter, glabrous, the 
tips of the branchlets slightly pubescent. Leaves oblong, mem- 
branaceous, glabrous on both surfaces, olivaceous, shining, 12 to 
20 cm long, 4 to 8 cm wide, the base narrowed, acute or slightly 
obtuse, the apex abruptly contracted and rostrate-acuminate, the 
acumen about 1 cm long, 2 to 3 mm wide, obtuse; lateral nerves, 
8 to 10 on each side of the midrib; petioles slender, glabrous or 
nearly so, 1 to 3 cm long. Panicles terminal, very slender, pe- 
duncled, 7 to 10 cm long, slightly pubescent, the branches few, 
spreading, 2 cm long or less. Flowers white, externally gla- 
brous, about 7 mm long, their pedicels filiform, 5 to 8 mm long. 
Calyx tube subovoid, the lobes linear-oblong, arched, cohering, 
about as long as the tube, hirsute. Androphore about 1.5 mm 
long, the anthers crowded in a globose head about 0.5 mm in 
diameter. 
British North Borneo, Labuk and Sagut Districts, Castillo 
665, September 21, 1918. In flat country of the Sumawang 
watershed, altitude about 20 meters. 
This species is closely allied to the Philippine Sterculia graci- 
liflora Perk., from which it is especially distinguishable by its 
more-numerous lateral nerves. 
