106 SIR DIETRICH BEANDIS—AN ENUMERATION 
Isoptera do not anastomose, but are separate throughout their 
course, terminating in the intercellular spaces of the pith. The 
petiole has a semicircle of 13-15 vascular bundles, closed by 8 
straight band of xylem and phloém at the top. The central mass 
consists of several curved bands of xylem and phloém with a con- 
siderable number of resin-ducts. 
ISOPTERA BORNEENSIS, Scheff. MSS. ex Burck in Ann. Jard. 
Buitenz. vi. (1887) 222; King in Journ. Asiat. Soc. Bengal, lxii. 
pars 2 (1893), 129. 
Pahang (Ridley); Perak; Bangka, Borneo. 
A large tree, which, however, according to Burck (On Minjak 
Tengkawang, communicated in Pharmaceut. Journal, 1887, 
p. 902), begins to fruit when about 6 years old, which, according 
to Mr. Ridley, is also the case in the Malay Peninsula. Leaves 
oblong; secondary nerves 10-16 pairs, nearly straight at first, 
curved near the edge of leaf, but without intramarginal veins; 
glabrous except midrib, which on the upperside is clothed with fine 
stellate hairs. Flowers in unilateral racemes, these distichous, 
forming racemose panicles. Fruit spherical, apiculate, tomentose- 
In Borneo the seeds of this tree yield the fat known as Tang- 
kawang-terindak. 
10. BALANOCARPUS, Bedd. 
(Including Richetia, Heim.) 
In 1873 Beddome established this genus upon two trees which 
he had found on the Tinevelly mountains, B. erosa and B. utilis. 
The flowers were those of Hopea, but the fruit was a hard 
almost woody nut, oblong or subglobose, with a sharp point 
at the apex, the lower part enclosed in the enlarged calyx, 
forming a woody 5-lobed cup, but not expanding into wings. To 
these two species Trimen in 1889 added (doubtfully) B. zeylani- 
cus, and King in 1893 seven others from Malacca, chiefly from 
Penang and Perak. One of these, B. penangianus, King, had 
previously been described by Heim as Richetia penangiana, and 
auother by the same author as P¿errea penangiana. The last- 
named, King called B. Heimii. 
The distinguishing characters of the genus may now be stated 
as follows :—Stipules minute, deciduous. Flowers supported by 
two bractlets, which are sometimes semipersistent, in unilateral 
racemes, these arranged in compound panicles. Calyx distinctly 
imbricate on a flat torus; petals generally cohering at the base, 
