249 
Pachynocarpus.] xx. dipterocarpace^e. 
Leaves nearly obovatc, very stiff; nerves very 
prominent.{2) P. Stapfianus 
Calyx cupular of 5 corky ribs grooved down the 
.{3) P. verrucosus 
Calyx-lobes much shorter than the oval fruit . . {4) P. Wallichii 
Calyx-lobes very short, corky, recurved; fruit long, 
conic . (5) P. Ridleyanus 
(1) P. umbonatus Hook. fil. Trans. Linn. Soc. xxiii. 159, t. 22. 
Small tree 20 to 30 ft. tall. Leaves stiff, coriaceous elliptic to 
elliptic-lanceolate, smooth above, reticulate beneath ; nerves 7 to 8 
pairs, elevate beneath, 4 to 5 in. long, 1 to 2 in. wide; petioles 
*5 in. long. Panicle 4 in. long or more, mealy; pedicels slender. 
Calyx mealy, lobes lanceolate acute. Petals *4 in. long, linear- 
oblong, blunt, fleshy, white. Stamens 10; anthers broad, elliptic, 
apiculate. Ovary adnate to calyx-tube; style stout. Stigma 
large, globose. Fruit 1 in. long and as wide ovoid, entirely covered 
with the thick rough corky sepals adnate to the nut for more 
than three-quarters of its length, cup obscurely lobed at the top. 
Hob. Forests, stream-edges. Singapore. Malacca (Maingay). 
Perak, Larut (Kunstler). Penang, Telok Bahang (Curtis). Lan- 
kawi islands, Sungei Batu Asap (Haniff). Distrib. Borneo. 
(2) P. Stapfianus King, l.c. 136. 
A tree 80 to 100 ft. tall. Branchlets stout. Leaves stiffly 
coriaceous, broadly elliptic or obovate-elliptic, beneath scurfy on 
the nerves; nerves 10 to 13 pairs, oblique prominent, 5 to 8 in. 
long, 2*75 to 4-5 in. wide; petioles *65 to 1 in. long. Flowers 
unknown. Fruit on a woody raceme 2 to 3 in. long, globular 
apiculate, i'25 in. through almost completely covered with the 
5-lobed woody rugose calyx, dark mouse colour speckled with dark 
brown. Hab. Pahang, K'luang Terbang (Barnes). Selangor, Bangi 
station (Foxworthy). Perak, Goping (Kunstler). 
This is certainly closely allied to P. umbonatus Hook, fil, but the foliage 
is much thicker and the nerves much more prominent. 
(3) P. verrucosus Ridl. Vatica verrucosa Burck, Ann. Jard. 
Buiienz. vi. 232, t. 3 fig. 5. 
Tree. Branchlets rather stout scurfy. Leaves thin coriaceous, 
oblong, shortly blunt acuminate, base cuneate; nerves 10 or 
more pairs slightly elevate beneath, reticulations conspicuous both 
sides, 6*5 in. long, 2*5 in. wide; petioles *5 in. long. Panicles in 
upper axils and terminal, 2 in. long, scurfy. Sepals broadly 
triangular and connate less than half-way, as long as the style, 
scurfy. Petals *5 in. long, linear-oblong, glaucescent .outside, but 
not mealy. Stamens 10; anthers elliptic. Ovary connate with 
the calyx-tube nearly to tip; style short thick. Stigma oblong. 
Fruit sub-globose, brown corky, 75 in. long and wide, the calyx 
covering the nut except the tip in the form of a 5-lobed cup, the 
lobes rounded on the back and at the tip, and grooved down the 
