426 



UTPJCULARIA NEGLECTA. 



CHAP. XVII. 



must therefore be developed one after the other, and 

 so it would be with tne two antennae. 



At a much earlier age, when the half formed 

 bladders are only -^-^ inch (-0846 mm.) in diameter 

 or a little more, they present a totally different ap- 

 pearance. One is represented on the left side of the 

 accompanying drawing (fig. 24). The young leaves 



FIG. 24. 



( Utricularia vulgaris.} 



Young leaf fram i winter buJ, showing on the left side a bladder in Its earliest stage 



of development. 



at this age have broad flattened segments, with their 

 future divisions represented by prominences, one of 

 which is shown on the right side. Now, in a large 

 number of specimens examined by my son, the young 

 bladders appeared as if formed by the oblique folding 

 over of the apex and of one margin with a prominence, 

 against the opposite margin. The circular hollow 

 between the infolded apex and infolded prominence 

 apparently contracts into the narrow orifice, wherein 

 the valve and collar will be developed ; the bladder 

 xtself being formed by the confluence of the opposed 



