2 SIR DIETRICH BRANDIS—AN ENUMERATION 
species are at present known to us. Under these circumstances 
any attempt at a new arrangement of the order must be regarded 
as provisional. Nevertheless such an attempt may be useful, in 
clearing the ground and in drawing attention to those characters 
which are of special importance in the systematic treatment of 
this order. 
The above figures do not include Ancistrocladus, which forms 
a separate order (Engler, Natürl. Pflanzenfam. iii. 6. p. 274), 
nor Lophira, which E. Gilg has justly transferred to Ochnacee 
(ibidem, p. 143), nor do they include the African genus Monotse, 
the position of which iu the system is doubtful. In regard to 
Monotes, reference is requested to what I have said regarding it 
in Engler’s Nat. Pflanzenfam. iii. 6. p. 273. 
Dr. Heim has in his ‘Recherches sur les Diptérocarpacées ' 
(Paris, 1892) established 30 genera in 8 series and 2 subseries. 
The * Monographie générale de la famille, promised on page 182, 
has not yet appeared. 
Giving due weight to all characters, anatomical as well as 
morphological, the safest plan at the present time seems to be, 
to make 5 tribus and 16 genera. In the following summary the 
external morphological characters only have been entered. 
I. DiPTEROCARPEAE.—AÀ. limited number of very prominent secondary 
nerves; calyx-tube enclosing the fruit; 2 lobes expanding into 
long wings. Stamens more than 20; connective prolonged into 
along point. Ovary with a large fleshy stylopodium. 
Stipules large, amplexicaul; calyx-tube free; 
stamens oo ; style filiform .......... 1. Dipterocarpus. 
Stipules small, deciduous; fruit connate 
with calyx-tube; stamens 20-35; style 
short ............... ces... eee. 2, Anisoptera. 
IL. DRYOBALANOPSEÆ.—Stipules small, caducous; secondary nerves 
very numerous, not prominent; stamens © ; connective with a 
short point. No stylopodium. Base of fruit enclosed in a short 
cup-shaped calyx-tube, the segments of which are equal (generally 
long) wings; pericarp splitting into three valves. 3. Dryobalanops. 
IIJ. SgonE.— Calyx as a rule imbricate in bud, the 2 or 3 outer lobes 
accrescent in fruit, forming long wings; rarely the 3 lobes equal, 
onger or shorter than fruit. Stamens mostly 15, rarely more, in a 
few cases 10. Connective mostly awned. 
3 wings; appendix of connective short, 
clavate ; no stylopodium...... es. 4. Doona. 
