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above the long hairs, the microscope reveals very short 

 hairs, as seen in Fig. 21. In pinguicula and other plants 

 which I have observed, when two sets of hairs are 

 found they gradually blend into each other; but here 

 a distinct line is drawn that can easily be seen with the 

 naked eye, and close to this line the hairs are as distinct 

 and marked in their character as on any part of the 

 surface. On the inner surface of the hood and around 

 the mouth of the tube is another set of curiously shaped 

 hairs (Fig. 22), which creates a roughness, and over 

 which the flies can easily walk. 



FIG. 23. HAIIiS ON l'HK INNKR SURFACE OF HOOD. 



The structure of the cord which secretes the sweet 

 fluid presents a marked difference under the microscope 

 from the rest of the plant. The epidermis is very thin 

 here, and the secretory glands are large and numerous. 



The plant secretes the sweet fluid only a few days-, 



