458 



INDEX 



117;; root-structure of, 73, 74 

 (fig.) stern-structure of, 84-6 



(figs.)- 



Zingiber officinale, 63. 



Zonation of Seaweeds, 199, 200, 

 202, 203. 



Zone of elongation of root, 65. 



Zoogloea-stages (of Bacteria), 262. 



Zoosporangia of Algae ; 196 (fig.) ; 

 Fungi, 218 (fig.), 219 (fig.). 



Zoospores, 214, 219, 238. 



Zoospores of, Cladophora, 215 ; 

 Cystopus, 232, 233 (fig.) ; Ecto- 

 carpus, 218, 219 (fig.) ; (Edo- 

 gonium, 216, 217 (fig.) ; Pleuro* 

 coccus, 191 ; Saprolegnia, 235 

 (fig.), 236 ; Ulothrix, 213 (fig.), 

 214 ; Vaucheria, 217, 218 

 (fig-)- 



Zoster a, pollen of, 361 ; stem- 



structure of, 172. 

 Zygnema, cell-structure of, 208 ; 



sexual reproduction of, 226-8 



(fig-).- 



Zygnema pectinatum, 227 (fig.). 



Zygomorphic flowers, 355, 373. 



Zygomycetes, 236-8 (fig.), 406. 



Zygospores, 186, 307 ; dispersal of, 

 186, 214, 228. 



Zygospores of, Chlamydomonas, 185 

 (fig.), 186 ; Conjugatae, 227 

 (fig.), 228 ; Desmids, 209 (fig.), 

 228 ; Ectocarpus, 219 (fig.), 

 220 ; Mucor, 237 (fig.), 238 ; 

 Ulothrix, 213 (fig.), 214. 



Zygote, 181, 185 (fig.), 186, 213 

 (fig.), 214. 



Zymase, 53, 57, 256. 



Printed by Hazell, Watson & Viney, Ld., London and Aylesbury. 



