THE VEGETABLE CELL 



Tvliea several such processes are formed, tlie cell acquires a stai'-like 

 appearance. When in such cases the cells are arranged in one 

 plane, as occurs in the cross-wallb of the aii-canals of many water- 

 plants, all the rays of the star lie in one plane (figs. 8, 9) ; when, on 

 the other hand, the cells are heaped together in masses, as in the 

 pith of Jwneus efficsus, the rays project from all sides of the cell. 



r^r; 7. 



Cells of the pith of 

 Acanthuh mollis 



Far more jErequent than such re- 

 gularly branched cells, are those 

 of a roundish form, exhibiting a 

 shorter projection at one or more 

 points, and so having a moder- 

 ately irregular form ; the paren- 

 chyma of the lower side of the 

 leaves of most plants is com- 

 posed of such cells (fig. 10). 



r,f/ 8. 



Stdlaic cellular tissue ftom the leaf s»tvlk 

 of Ahi6a. 



V-TniJ 



^.1 c-«« 



Partition "boundrng an air-canal m the 

 loaf-stalk ot Bagittana sagittifoha. 



Fig. 10. 



•\ 



-0 



\ rf^'k k^O >pi 



ParenclijTiiato^i's cells fi'om the leaf of 

 Orehts mmcula* 



Ohserv, Some pliytotomi&ts have 

 distinguished a greater immber of 

 tissues according to the forms of the cellb, applying partictdar names to 



