. 



SECT. IV. APPENDAGES. 37$ 



tables, and afterwards by Tournefort whose descrip- 

 tion of it is more explicit, whose observations 

 it is more easy to repeat, and in the repeating of 

 which the pubescence in question is easily de- 

 tected. The result of my own observations is as 

 follows : 



If a thin slice of the transverse section of the And easily 

 leaf-stalk, or flower-stalk, of Nymphea luteais ex- 

 amined with the naked eye, it will be found to 

 resemble a piece of fine flowered lace, the interstices 

 being in some parts filled up with an intervening 

 substance, or narrowed so as to be scarcely percepti- 

 ble. The interstices are merely sections of longi- 

 tudinal tubes or openings pervading the pulp of the 

 leaf-stalk ; and the intervening substances with 

 which some of them are occupied are bundles of 

 longitudinal fibres, closely crowded together agree- 

 able to the general structure of herbaceous plants. 

 If the slice is now placed under the microscope, the 

 interstices will appear to be hexagonal, and a great 

 proportion of them, particularly those that are cen- 

 tral, will be seen to send out from-, their internal 

 surface a number of small and pointed or conical 

 substances projecting about half way across the in- 

 terstice, and appearing under the microscope like 

 little thorns or spines. They are transparent like 

 the external hairs or down, and seem also to be pro- 

 longations of the Cellular tissue. 



If an additional slice is now taken, the same ap- 



