Survey of Plant Kingdom 147 



Endosperm 

 (Protein) 



Endosperm 

 (starch) 



Cotyledon- 



-Epicotyl 



Seed coat 

 -Hypo coty J 



Embryo 







-'--'^dvenfcitipas roots 



^--Primary roots__f__^ p 



Fig. 59. — Indian corn showing its gi^ain and its germination. A, Longitudinal 

 section perpendicular to the broad face of the grain (much enlarged) ; B, surface 

 or face view ; C, surface view with seed coat removed ; D, E, F, stages of germina- 

 tion and embryo development. 



_/4?rjpac(? 



Epidermis ^^Jtomatq^^ O 



--.Vein 



^ Cuticle 



'Chloroploitids 



Companion cell" 



PHoem- 



- Sieye tube. 



XyfGiD 



, Airspace 



, Sheath cell 



Fig. 60. — Indian corn (Zea mays). A, Leaf (external view) ; B, leaf in cross 

 section (somewhat diagrammatic) ; C, stalk or stem (cross section) ; D, one vas- 

 cular bundle very much enlarged (cross section), Chloroplastids are also called 

 chloroplasts. 



