186 DEVELOPMENT OF THE OVULUM 
running along, or nearly so, the line of union. Sometime after 
the lapse of the corolla, &c. a cavity will be found in the 
axis of the nucleus reaching from near its base above the 
middle: a line will be likewise seen running from its apex 
to the apex of the nucleus, indicating its future extension. 
Sometime after, it occupies the distance between both these 
points. It does not appear to be lined by a membrane. To 
it a cellular sac would seem to be attached, itself adhering 
to the nucleus ; if so, it is an exception to my opinions as to 
the existence of albumen being linked to that of a mem- 
branous albumenary sac.* Most probably the albumen in 
this genus is developed with the nucleus, and if so, it is not 
an exception, The embryo is of very late appearance. 
The embryonary sac is united by both ends to the cavity 
existing in the nucleus. The cotyledons are developed 
opposite the raphe; the osseous part of the fruit is the in- 
durated ovary, and may be easily mistaken for an indurated 
testa. The parietes of the embryonary sac may be mistaken 
for a distinct membrane. 
Suddyah: 19th June, 1836. 

IMPATIENS tripetala, —PrLATE xLv.—Fic. 3. 
The ovula are campylotropous: of the second integument 
which at an early period is distinct enough, no traces are dis- 
coverable a short time before the expansion of the flower. At 
the time of expansion the nucleus scarcely projects beyond 
the foramen. The embryonary sac is pendulous or affixed 
to the apex of the nucleus, it rapidly enlarges and soon obli- 
terates the nucleus: the apex of which, however, is dis- 
coverable up to a rather late date, capping the apex of the 
sac, which is cellular-membranous. The embryo appears 
early: and although at an early period the cotyledons are 
parallel to the broader faces of the seed, yet I think that ori- 
* See note page 176. 


