204 



THE FLOWER. 



in the manner of Fig. o42-54.j. Between these two there is 

 every gradation. The first forms a compound ovary. 



\'J'2. With two or more Cells and Axile Placentae. For it is 



evident that, if tin- contiguous pails of a \\horl of two or more 

 closed carpels cohere. Ilic resulting compound ovary should have 

 as many cells as there are carpels in its composition, and that 

 the placenta- (one in the inner angle of each carpel) will all be 



brought together in the axis of the compound pistil. And the 

 partitions, termed DISSEPIMENTS, which divide the compound 

 ovary into cells, manifestly consist of the united contiguous por- 

 tions of the walls of the carpels. These necessarily are composed 

 of two layers, one belonging to each carpel; and in I'm it they 

 often split into the two layers. True dissepiments and the true 

 cells must accordingly be equal in number to the carpels of 

 which the compound pistil is composed. That is, the ovary, or 

 the resulting fruit, is bilocular or 2-celled. irilocnhtr or 3-celled. 

 quadrilocular or 1 -celled, and so on, according to the number of 

 dissepiments or cells. 



493. There may also be false i/i'.w/n'mi-iifs. mostly of the same 

 character as Hut' which in Fig. .">."> 1 divides the cell of a singn- 

 carpel. Such are found in Flax (Fig. f>3!>-.Vl 1 ) . in Amelanchier 

 or Service-berry, in Huckleberry (< layhissaeia) . and in most of 



FIG. 535. T'istil of :i S;i\ilY:i-< nipnsr.l ,.r two carpels or simple pistils united 



below l.ut distinrt abOTe; cm acrOBB l>th al.ove :nul below. 



FKi. r,:;6. Pistil of common St. Johnswort, of three united ovaries; their 



distinct. 



FK!. 5.'!7 The same of another species <.f St. -Tohnswort (Hvpencum prolificum), 

 tin- Mvlrs ,-ilso niiili'il into on.>. whi.-h. however, limy split ;ip:irt in tin- fruit. 



FIG. 53S. I'i-iil of 'I'T-.-Llrsrantia or Si.i.l.'rwort. even the three sti-nias united into 

 one. The ovary in all cut across to show the internal structure 



