146 
Fig. 10. 
Fig. 11. 
SIR DIETRICH BRANDIS—AN ENUMERATION 
bud, the 3 upper for the petiole, which thus receives 2 lateral and 3 
apical resin-ducts. 
Shorea obtusa, Wall. (Magnified 17 times: Alcohol Material, Burma.) 
Section through the upper half of a leaf-bearing internode. Three 
leaf-traces in the bark, the apical with 3, each of the two lateral with 
one resin-duct, The lateral leaf-traces are in course of bending 
forward, in order to join the apical trace, their xylem and phloém are 
no longer directed towards the circumference but towards the apex. 
Indications of 2 stipular traces, without resin-ducts, below the 2 
lateraltraces, In the neck of the pith 3 resin-ducts intended for the 
axillary bud ; besides these, in the body of the pith 14 ducts. 
Dipterocarpus alatus, Roxb. (Magnified 10 times: Alcohol Material, 
Burma.) Section through the upper portion of leaf-bearing internode, 
under insertion of petiole. Three leaf-traces, the 2 lateral in the 
bark, the apical not yet fully separated from the central cylinder. one 
resin-duct in each, 8 ducts entering the wood, destined for stipular 
leaf-traces. Besides these, 22 ducts in pith. 
Fig. 12. Dipterocarpus pilosus, Roxb. (Magnified 10 times: Herb. Brandis.) 
Section through leaf-bearing internode, immediately under insertion 
of petiole. The petiole is in process of formation, the right-hand 
lateral duct having coalesced with the apical, that on the left-hand 
being as yet separate. In addition to these there are 6 stipular traces 
in the bark, each with a resin-duct, the same number of ducts in the 
wood, destined for 6 more stipular traces. Besides these, in the pith 
23 ducts. 
Figs. 13-15. Hopea cernua, Teysm. et Binn. (All figures magnified 24 times: 
Fig. 18. 
Herb. Brandis.) 
Petiole at the base. Three distinct vascular bundles, two lateral and 
one on the underside of the petiole, each with one resin-duct in the 
pith. A central four-sided ring of xylem and phloém, enclosing a 
semicircular vascular bundle. 
Fig. 14. Petiole near the top, below insertion of blade. The 2 lateral ducts 
have bifurcated, the central mass of vascular bundles has changed its 
shape. 
Fig. 15. Transverse section through midrib near base of leaf. The 3 vascular 
bundles have united and form an undulating semicircle with 5 resin- 
ducts. The central body consists of one half-moon shaped and 2 
elongated masses of xylem and phloém. 
Fig. 16. Hopea odorata, Roxb. (Magnified 17 times: Alcohol Material, Cal- 
cutta.) Petiole below insertion of blade. Nine vascular bundles, each 
with a resin-duct, forming a continuous semicircle on the underside 
of the petiole. The semicircle is closed at the top by a straight bar 
