44 



OVULE. 



239. When the base of the secundine and nucleus 

 still keep, as in the former case, to the true base at the 

 placenta, but the whole ovule is doubled down upon 

 itself, its axis ceasing to be rectilinear, we have a cam- 

 pulitropous ovule (B), as in the Mustard. 



Fig. 44. 



240. When the base of the nucleus and secundine 

 no longer keep with that of the primine or true placental 

 one, but is turned quite away from it, the nucleus, etc., 

 being, as it were, upside-down, we have an anatropous 

 ovule (c), as in the Apple. 



241. These are the essential differences in regard to 

 the direction of the parts of the ovule, and we must re- 

 member that in the orthotropous ovule, the chalaza (f), 

 is at the proper placental base, whilst the foramen is op- 

 posite or at the point of the nucleus farthest away from 

 it (<?) : in the campulitropous ovule the chalaza is at 

 the placental base, but the foramen is brought down to 

 one side or level with it, whilst in the anatropous ovule 

 the chalaza is removed from the placental base, and the 

 foramen is brought down to it. In this example, in 

 consequence of the removal of the base of the secundine 

 and nucleus from that of the primine and placental one, 

 a vascular cord (&), called the raphe, is sent up until it 

 meets with the base, when it expands upon it as the 

 chalaza. 



241. We have now described the reproductive struc- 

 tures and their parts as they exist immediately previous 

 to fertilization, and only have left certain modifica- 

 tions or transformations of portions of them to speak 



