426 



UTKICULAEIA NEGLECTA. 



Chap. XYII. 



must therefore be developed one after the other, and 

 so it wonld be with the two antennee. 



At a much earlier age, when the half formed 

 bladders are only 3-^ 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 from a wiuter bud, 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 shoT^^l 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 aj)ex 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 

 itself being, formed by the confluence of the opposed 



