212 NATURAL HISTORY OF PLANTS. 
a large fleshy embryo, the contortuplicate cotyledons of which 
are very irregularly lobed, ruminated, and very unequal 
among themselves, the larger one completely enveloping the 
smaller,’ around which it is convoluted. The radicle is superior 
and conical, longer or shorter according to the age of the 
seed. Only one species of this genus 
is known at present, D. aromatica,’ 
better known under the name of 
Camphor tree of Sumatra or Borneo. It 
is a fine tree, with resinous juice, its 
alternate leaves being simple, entire, 
coriaceous, penninerved, with numerous 
secondary nerves, oblique, parallel, with 
short petiole, accompanied at its base 
by two small very caducous stipules. 
Its flowers are disposed at the summit of 
the branches or in the axils of the superior 
leaves in ramified clusters, upon whose 
axes they are alternately inserted, 
articulated upon a little prominent 
cushion, below which is found the trans- 
versal cicatrice of a bract. 
In the Dipterocarpee (fig. 215), the 
general organization of the flower is the 
same, especially as to the corolla and sexual organs; but the gamo- 
sepalous tubular calyx is cut above into five very unequal teeth, at 
first slightly imbricated, then valvate, or even ceasing to touch each 
other by their edges. Two of them develop much more than the 
other three, and form above the fruit, which is closely enveloped by 
the general part of the calyx, two long erect rigid wings almost 
coriaceous and reticulate. The woody indehiscent pericarp encloses 
Dipterocarpus trinervis. 

Fig. 215. 
Fruit? (1). 
! The latter being not only much narrower 1, 264.—Mr1qQ., FU. Ind.-Bot., 1, p. ii. 500; 
but much shorter than the other, A false verti- Prodr, Fl. Sum. 191—Hoox. F. in Zrans. Linn, 
cal partition, incomplete in its upper part, and  Soc., xxiii. 160.—Shorea camphorifera Roxs., 
terminating at this point in an oblique, irregular FV. Ind., ii. 616.—Pterygium teres Corr., loc. 
edge, separates the largest of the cotyledons in cit.—Dipterocarpus Dryobalanops STEUD.— 
its lower part into two almost symmetrical D, teres Srrup.—Camphora sumatrensis W. D. 
halves, RHYNE, in Breyn. Prodr., 9.—Rumpu., Herb, 
F' 2 GænTN. F., loc. cit.—Bu,, Mus. Lugd.-Bat., Amboin., Auct., 67. 
ii, 38.—D, Camphora Couesr., loc, cit., e. ic.— 3 Fig. reduced from #7. Jav. of BLUME (Dipte- 
Jack, Mal, Mise.,in Hook. Comp. to Bot. Mag.,  rocarp., t. 1). 
