OKGANS OF REPRODUCTION. 



271 



We have just observed that all dissepiments are said to be 

 spurious except those which are formed by the union of the sides of 

 contiguous ovaries, and it occasionally happens that sxich spurious 

 dissepiments are formed in the course of growth, by which the 

 ovary acquires an irregular character. These false dissepi- 

 ments commonly arise from projections of the placentas in- 

 wards, or by corresponding growths from some other part of the 

 walls of the ovaries. Some of these are horizontal, and are c lUed 

 phragmata, as in the Cassia Fistula [fig. 600), where the o rary, 

 after fertilization, is divided by a number of transverse dissepi- 

 ments which are projections from its walls. Others are ver ical, 

 as in Cruciferous Plants, where the dissepiment, called a rep'um 

 {fig. 601, f^), is formed from the placentas; also in JDcitura 

 Stramonium, where the ovary is formed of the laminae of two 

 Ciirpels, and is hence normally two-colled, but instead of thus 

 being i)ilocular, it is quadrilocular below {fig. 602) from the 



Fig. 600. Fig. 601. 



Fig. 602. 



Fig. 603. 



i 



'nm0K 



Fig. 600. A vertical section of a portion of the ma- 

 ture ovary oi Cathnrfocarims or Cassia Fistula, 

 sliowiiig a number of transverse spurious dis- 

 sepiments. Fl{j. 601. Vertical section of the 



ovary of the Wallflower, ov. Ovules attached 

 by a stalk to the placenta, en. cl. A^ertical 



spurious dissepiment called the replum. 



Fig. 602. Transverse section of the lower part 

 of the ovary of the Thorn-apple {Dntnra Stra- 

 mo-nium), showing tlint the ovary is here 



quadrilocular. Fig. GO^i. Transverse section 



of the same ovary at its upper part, showing 

 that it is here bilocular. 



formation of a spurious vertical dissepiment, but towards the 

 apex it is still bilocixlar {fig. 603), the dissepiment not being com- 

 plete throughout, and thus the true structure of the ovary is 

 there indicated. In the Gourd tribe also, spurious dissepiments 

 appear to be formed in the ovary in a vertical direction bv pro- 

 jections from the placentas. In the Flax again {fig. 6f)4, b), 

 spurious incomplete vertical dissepiments are formed in the ovary 

 by projections from the dorsal sutures. In the ovary of the Astra- 

 galus {fig. 605), a spurious dissepiment is also formed by a 



