INDEX 



547 



Vallisneria, 34 



Vanda, 185 



Vascular bundles, systems of, 56- 



61 ; of Sunflower, 56 ; of Maize, 



166; of Ferns, 289 

 Vascular network, in stem of Ferns, 



289 



Vaucheria, 429 

 Velamen, 185 

 Velum partiale, 455 

 Ventral canal-cell, 315, 375 

 Vessels, 73, &c. ; laticiferous, 118 

 Viburnum, glands of, 142 

 Vitis, bark of, 101 

 Volvocinete, 437 

 Volwx, 437 



Wallflower, leaf of, 127 

 Walnut, seed of, 216 

 Water of imbibition, 36 

 Water stomata, 141 

 White Rust, 495 

 Winter-spores, 463, 469 

 AVood, see Xylem 



Wood-fibres, 96 

 Wrack, 391 



Xylem, of Sunflower, 73 ; of Elm, 



96, &c. ; of Pine, 133, &c. 

 Xylem fibres, 96, &c. 

 Xylem parenchyma, 96, &c. 



Yucca, stem of, 169 



Zea, fruit of, 218 ; germination of, 



227 ; stem of, 161 ; apex of, 166 ; 



leaf of, 172 ; root of, 180 ; apex 



of root, 183 

 Zoogonidia, 433 

 Zoosporan^ia, 494 

 Zoospores, of Ulothrix, 426 ; of 



Pythium, 494 ; of Cystopus, 496 

 Zy gnema, 442 

 Zygospores, of Ulotlirix, 426 ; of 



tiporodinia, 500, 501 

 Zygote, of Closterium, 448 ; of 



tipirogyra, 446 ; of Sporodinia, 



501 



THE END 



RICHARD CLAY AND SOIfS, LIMITED. LONDON AND BUN GAY. 



