vi HOW TO PREPARE AND EXAMINE SECTIONS 69 



(ii) The way the rootlet springs from close up to the vascular bundles, 

 and breaks through the cortex and epidermis. 



EXPT. 63. Dig up a few rhizomes of the Sweet Flag (Acorus). It 

 can be found growing in ditches in Lancashire, Yorkshire, Somerset, 

 Sussex, and in Scotland and Ireland. 



Select a young one and cut transverse sections ; choose a thin section 



and mount it in glycerine. Examine, 

 and note 



(i) The scattered vascular bundles 

 (Fig. 94). 



(ii) The vascular cylinder formed 

 by the numerous vascular bundles. 



FIG. 93. Transverse section of the 

 root of Maize. R, R, roots. (Xi2.) 



FIG. 94. Transverse section of the 

 rhizome of the Sweet Flag, (x 2.) 



dr 



s 



(iii) A few roots which spring from close up to the vascular bundles 

 may also be seen ; in Fig. 94 they can be seen breaking their way 

 through the external tissues. 



EXPT. 64. From a stem of the 

 Vegetable Marrow cut transverse 

 sections. Select a thin one from 

 these and mount it in water. Ex- 

 amine and note 



(i) The pith (which may have 

 dropped out). 



(ii) The vascular bundles in which 



ere are a number of large open 

 essels. 



(iii) The epidermis which presents 

 a sinuous outline. 



EXPT. 65. Make a thin trans- 

 verse section through the wood of 

 the Pine which has been kept in FIG. 

 alcohol for some time to remove the 

 resin. Mount in glycerine, and 

 examine. Note 



(i) The cells ; these are small and close together (Fig. 97) in one part 

 of the section, but large in the remaining portion. 



(ii) The small thick walled cells are formed in late summer and autumn, 



95- Tr 

 >fVezeU 



of Vegetable Marrow. The middle 

 of section has dropped out. (X 5.) 



