INDEX 



381 



Zamia, 111, 178; Z. fioriclana, 179; Z. 



umbrosa, 182; Fig. 39 

 Zea, 212, 276, 303; Z. mays, 270, 272, 



293, 297; Figs. 7, 71 

 Zeuxine sulcata, 286; Fig. 78 

 Ziebur, 303 

 Zizania, 262 

 zygote and spore compared, 167 



zygote, biochemical patterns in, 164, 

 165; biophysical and metabolic 

 changes in, 50; constitution of, 81, 

 82; environment of, 7; free nuclear 

 division in, 179, 186, 190; gene- 

 controlled differentiation in, 25; 

 organisation of, 164, 165; proto- 

 plasmic differentiation in, 22 



