210 DEVELOPMENT OF THE OVULUM 
Relations of the teguments of the seed with those of 
ovulum. 
Development of cotyledons 
Relative site of large plumulary leaf. | 
Impregnation in Nelumbium 
-I have already remarked, that no change whatever takes 
place in the situation or direction of the ovule from its earlier 
periods, to its mature state. It is a general rule that the 
openings of the coats of the ovula are presented directly, or by 
the shortest route to the influence of impregnation ; very 
marked examples of this law occur in Plumbaginee, Castine, 
&c. and in Leguminose, in which the openings are always 
uppermost, for the knowledge of wbich I am indebted to Dr. 
Brown. The present anomaly is caused, I imagine, by the 
shortness or thickness of the funicle which obviates all change 
about the period of fecundation. The stigma is large, and high- - 
ly papillose : its canal communicating with the interior of the 
carpellum is very distinct, and likewise papillose, tbe papille 
gradually diminishing as we- proceed downwards. They are 
prolonged down on the funicle, but terminate on a level with 
the exostomium, rather to the base of the funicle. On the 
opposite side they terminate on a level with the apex of the 
ovarium. Pi. 
The stigmatic surface will be found covered with pollen, 
the boyaux of which have entered the canal, the outer mem- 
brane enveloping the upper portions of these prolongations. 
The stigmatic canal is filled likewise with a mucilaginous 
tissue which passes among the papille. (P1. 56, fig. M. 1, 6.) 
On the side next the ovulum it is reflected over the whole of 
the funicle. It terminates in a cap or hollow blunt cone- 
shaped prolongation, (P/. 56. M. 3,) which passes off to, 
and appears to embrace the exostome. Pi. 56, F. fig. 2, 3. 
The termination of the canal is bounded by a transparent 
membrane containing some granules, which n over the 
pille. (See pl. 56, fig. M. 1, b; and pl. 56, F. 2,3. a. a) - 
The circumferential tissue of the funicle is yellowish and 
mucilaginous. 
