MORPHOLOGY, ANATOMY, AND PHYSIOLOGY. 



821 



Velamen, 134, 155 (Fig. 117), 682. 

 Velum, 72, 311, 312 (Fig. 222), 38 i 



(Fig. 256). 

 Venation, free, 55 (Fig. 33). 



furcate, 55. 



parallel, 55 (Fig. 34). 



reticulate, 55 (Fig. 35). 

 Venter, 326, 376. 

 Ventral canal-cell, 82, 117, 326, 377. 



scales, 334, 336, 340, 342. 



suture, 522. 

 Vernation, 59, 742. 

 Versatile anther, 517 (Fig. 331). 

 Verticillaster, 493, 642. 

 Vessel, 134. 



Vexillum, 635 (Fig. 435). 

 Vital functions of the tissues, 671. 

 Vittaj, 625 (Fig. 426). 

 Volatile oils, 708. 

 Volva, 312, 319. 



Wart, 66. 



Waste products, 670, 727* 728. 

 Water-culture, 715 (Fig. 474). 

 Water, absorption of, 693. 



distribution of, 700. 

 -stoma, 138 (Fig. 100), 157 (Fig. 

 121), 730. 



Wax, 155. 



Whorl, 23 (Fig. 11), 25 (Fig. 12), 496. 



Wings of fiuits, 531, 617. 



of leaf, 45. 



Witches' brooms, 711. 

 Wood, 170 (Figs. 126, 130, 133, 134, 



137), 194, 677. 



Wood-parenchyma, 132, 195. 

 Woody fibre, 196 (Fig. 148). 

 Woronin's hypha, 298. 



Xerophilous plants, 628, 675, 687. 

 Xylem, 170 (Figs. 127, 139, 146, 147). 

 677. 



Zinc, 716. 



Zonate tetragonidia, 267. 



Zoocyst, 285. 



Zooglcea-stage, 281 (Fig. 197). 



Zoogonidium, 69, 115 (Figs. 74, 75), 



226, 243, 283, 286, 291 (Figs. 



203, 204). 

 Zoospore, 69, 229, 247 (Figs. 176. 



178). 



Zygomorphic symmetry, 8, 10, 508. 

 Zygospore, 80, 118 (Fig. 76), 220, 225, 



229, 242, 244 (Figs. 173, 175, 



176). 



Butlei & Tanner, The Selwood Printing Works, Frorne, and London, 



