MORPHOLOGY, ANATOMY, AND PHYSIOLOGY. 



597 



Variation, movements of, 207. 



in direction of growth, 209. 



in rate of growth, 208. 

 Variety, 235. 

 Vascular bundles, 121 (Figs. 99-105). 



tissue-system, 101, 121. 

 Vegetative cell, 393, 406. 



reproduction, 49, 227. 



reproductive organs, 49, 228. 

 Velamen, 93, 106 (Fig. 87). 

 Velum, 302 (Fig. 182), 356 (Fig. 213). 

 Venation, free, 38 (Fig. 24). 



furcate, 38. 



parallel, 38 (Fig. 25). 



reticulate, 39 (Fig. 26). 

 Venter, 311, 350. 

 Ventral, 7. 



canal-cell, 311 (Fig. 194). 



scales, 319. 



suture, 465. 

 Vernation, 43, 211. 

 Versatile anther, 461 (Fig. 276). 

 Verticillaster, 442. 

 Vessel, 94, 147. 

 Vexillum, 557 (Fig. 369). 

 Vital functions of the tissues, 162. 

 Vittse, 549 (Fig. 361). 

 Volva, 303. 



Wart, 48. 



Waste products, 158, 201. 

 Water-culture, 192. 

 Water, absorption of, 178. 



distribution of, 181. 



-stoma, 97 (Fig. 89), 108. 

 Wax, 107. 



Whorl, 10, 12 (Figs. 4, 5), 445. 

 Wing, of flower, 545. 



of fruits, 473, 545 (Fig. 357). 



Wood, 121/129, 139 (Figs. 112-115), 



Wood-parenchyma, 129, 140. 

 Woody fibre, 140 (Fig. 111). 



Xylem,121, 164. 



Zinc, 189, 193. 

 Zonate tetraspores, 271. 

 Zoogloea-stage 281 (Fig. 163). 

 Zoospore, 51, 67, 72, 85 (Fig. 62), 230, 



247, 257 (Fig. 147), 201. ->-i 



(Fig. 169> 



Zygomorphic symmetry, 4, 7, 454. 

 Zygospore, 58, 240, 249, 254, 257, 277, 



285 (Figs. 145, 146, 165, 166). 



