xi, c, 2 Merrill: Notes on the Flora of Borneo 99 
neis, chartaceis, integris vel obscure crenulatis, prominente acu- 
minatis, basi acutis, nervis utrinque 5 ad 8, prominentibus ; 
inflorescentiis racemosis, 3 et ? quam foliis multo longioribus; 
floribus numerosis, 4-meris, sepalis glabris; fructibus circiter 1 
cm longis, dense tomentosis. 
A dioecious tree, glabrous except the young branchlets, very 
young leaves, and inflorescences. Branches slender, terete, us- 
ually pale-gray, the young branchlets minutely appressed 
cinereous-puberulent. Leaves oblong, entire or very obscurely 
crenulate, brown and slightly shining when dry, 8 to 17 cm long, 
3 to 6.5 cm wide, base acute, apex rather slenderly and prom- 
inently acuminate, the acumen 1 to 1.5 cm long, usually apiculate, 
both surfaces quite glabrous or the midrib and lateral nerves 
beneath minutely and obscurely puberulent; lateral nerves 5 to 
8 on each side of the midrib, prominent, curved, anastomosing, 
the reticulations very slender; petioles usually about 1 cm long; 
stipules linear-acicular, 3 to 4 mm long. Staminate and pistillate 
racemes in the uppermost axil, sometimes in lower axils, usually 
simple, rarely with a single elongated branch from the lower 
part, up to 30 cm in length, both much exceeding the leaves in 
anthesis, appressed-pubescent with pale hairs. Flowers num- 
erous, few in the axil of each bract, the pedicels about 1 mm 
long, pubescent, the acuminate bracts about as long as the pedi- 
cels. Flowers all 4-merous. Sepals broadly ovate to elliptic 
ovate, membranaceous, glabrous, rounded, of the staminate 
flowers 2.5 to 3 mm long, of the pistillate ones about 2 mm long. 
Scales densely pale-pubescent, about 1.5 mm long. Rudimentary 
ovary of the staminate flowers oblong, densely pubescent, shortly 
stipitate, about 2 mm long; filaments slightly pubescent below, 
about 3 mm long, those of the pistillate flowers about 1 mm in 
length. Ovary globose, densely pubescent, tipped by three short 
glabrous styles. Fruit about 1 cm long, oblong, usually some- 
what inequilateral, with three rounded angles, densely pale- 
tomentose. Seeds ellipsoid, about 5 mm long. 
Sarawak, Baram District, Marudi, Hose 323 (type) ; Lembang, Hose 747; 
various localities in the vicinity of Kuching, Native collector 642, 643, 1143, 
1144, 1145, 1152, 1168, 1826, 1908 (Bur. Sci.). 
This small genus has previously not been reported from Borneo, the 
known species being Osmelia paniculata Warb. ( O . gardneri Thw.) of 
Ceylon, O. maingayi King of the Malay Peninsula, O. celebica Koord. of 
Celebes and Mindanao, and three Philippine species, O. conferta Benth., 
O. philippinensis Benth., and O. subrotundifolia Elm. The species above 
described appears to be most closely allied to Osmelia maingayi King, from 
which it differs in its usually simple, elongated racemes, its glabrous leaves, 
and its entirely glabrous sepals. 
