248 xx. dipterocARPACE iE. [ Balanocarpus. 
blunt not contort. Stamens 15; filaments rather long slender, 
base broad triangular narrowing to the tip; anthers linear with 
a short point. Ovary glabrous with a long stylopodium; style 
long, filiform, long persistent. Fruit cylindric acute, 1*5 in. long, 
•5 in. wide; pericarp woody glabrous, dark yellow. Sepals forming 
a cup -6 in. deep. Hab. Forests. Pahang, Temerloh and Bentong 
(Foxworthy). Negri Sembilan, Bukit Pergai Triang (Foxworthy). 
Selangor, Klang at Bukit Cheraka (Foxworthy). Perak, Thaiping 
district (Kunstler); Kwala Kangsa (Foxworthy); Gapis (Wray). 
Native names : Chengal Penak; Penak Tembaga; Chengal Siput. 
King’s specimens of this and of B. Wmyi are only in fruit, but I have 
little doubt on carefully comparing the foliage that Foxworthy's flowering 
specimens belong to the same species. The only difference that I can see 
between B. Heimii and B. Wrayi is that in the latter the leaves are smaller 
and quite glabrous, whereas in B. Heimii the petiole and midrib usually are 
puberulous or pubescent. Wray’s specimens are in unripe fruit, and the 
size of the leaves and amount of pubescence vary in B. Heimii. 
(7) B. maximus King , l.c. 133; Ann. Bot. Gard. Calc. v. (2), 
159, pi. 192. 
Vast tree 100 ft. tall, glabrous except inflorescence. Leaves 
thinly coriaceous, oblong or elliptic-oblong sub-acute, base rounded; 
nerves 7 to 9 pairs, 5 to 7 in. long, 2 to 2-5 in. wide; petioles ’5 
to -6 in. long. Panicles tomentose, 6 in. long. Flowers sub-sessile 
•6 to 7 in. long, light yellow, calyx cream colour. Sepals ovate, 
outer 2 tomentose. Petals much longer, narrow oblong, tip erose, 
pubescent outside and on tip outside. Stamens 10; awn deflexed. 
Fruit cylindrical acute; pericarp woody, 175 to 2-25 in. long, 
*6 to 7 in. through. Sepals forming a toothed cup at base -5 in. 
long. Hab. Dense forests. Johor, Gunong Pulai. Pahang, Kwala 
Lipis at Sungei Benchah (Foxworthy). Perak, Batang Padang 
district (Kunstler). Native name : Chengal Penak. Use: Tim¬ 
ber highly valuable for building boats and for sleepers. Dammar 
much valued, being quite transparent, for varnish, etc. 
14 . PACHYNOCARPUS, Hook. fil. 
Small-sized to medium trees. Leaves coriaceous, rather thin 
elliptic or oblong, reticulate. Panicles terminal or axillary, lax. 
Calyx of 5 sepals, connate at base, small mealy. Petals much 
longer, often mealy on the back. Stamens 10 to 15 in 2 rows, 
very short; anthers elliptic; connective prolonged into a short 
point. Ovary often sunk in calyx-tube; style short, thick. 
Stigma oblong or sub-globose. Fruit corky brown, the persistent 
sepals forming short corky processes or lobes attached to the nut, 
and occasionally forming a cup almost covering the nut. Species 
about 10, Siam, Malay Peninsula and islands to New Guinea. 
Calyx almost covering the nut in fruit. 
Calyx cupular, not lobed. 
Leaves oblong; nerves hardly elevate . . (1) P. umbonatus 
