CH. Vl] 



SECTIONS OF BUDS 



45 



method with the two already mentioned, and that is the 

 study of transverse sections of the bud. These are easily 

 obtained now that laboratory methods of hardening and 

 cutting have reached so high a stage of development, and 

 although much useful information can be obtained from a 

 single clean cut across the middle of the bud, the student 

 must remember that more than this is needed to elucidate 

 the structure of a whole bud. 



For instance, in Fig. 27 we have a transverse section 

 across the bud of a Poplar, which shows us many details 

 as to the arrangement of the bud-scales, the involute 



Fig. 27. Transverse section of bud of Black Poplar, Populus nigra, 

 showing spirally arranged bud-scales (stipular) and involute leaves each 

 with its pair of stipules. 



leaves and so forth ; but there is nothing to show that 

 we have the bud in its proper position, or that we have 

 drawn all the scales and leaves composing it. 



In the cases shown in Figs. 28 and 29, illustrating the 



