44 



CORN' 



raw plant food drawn fruiii the roots, and the distributing canals for 

 the cell sap which has been manufactured therefrom in the leaves. 

 These bundles are quite woody and fibrous and can be seen in an old 

 corn stalk, appearing very much like threads. These tubes, of which 



Fibro Vascular Bundle. Cross-section of a closed collateral bundle from the 

 stem of corn, showing the xylem with annular (r), spiral (s), and pitted (g) 

 vessels; the phloem containing sieve vessels (v), and separated from the 

 xylem by no intervening cambium; both xylem and phloem surrounded by a 

 mass of sclerenchyma (hl)ers); ami inx'esting vessels and fibers the paren- 

 chyma (p) of the pitb-likp tissue through which the liundles are distributed. — 

 After Sachs. 



