INDEX 



679 



F. olavata, V. gemlnata, Fig. 89; V. 



sessilis, Fig. 88. 



Velum, Isoetes, 317 ; Mushroom, 184. 

 Venus's flytrap (see a/so " Dionaea "), 7. 

 Verbascum, 453, 454; V. blattaria, Fig. 



444. 



Verbeuaceae, Verbeninese, 458. 

 Veronica, 411, 454; V. scutellata, Figs. 



391, 444. 



Verrucaria marmorea, 189. 

 Verticillatae, 414. 

 Vessel, 58, 257. 

 Vetch, 504. 



Viburnum, 454, 455, Fig. 445. 

 Vicia Faba, 482, Fig. 456. 

 Victoria regia, 486. 

 Vinca, 452. 



Vine-mildew (see " Plasmopora ") 

 Violaceae, 439, 447. 

 Viola, Violet, 22, 366, 438, 439, 483, 493, 



512; V. cucullata, Figs. 13, 332; F. 



rostrata, Fig. 464. 

 Virginia-creeper (Ampelopsis quinque- 



folia) , 24, 504. 

 Viscum, 476. 

 Vitaceae, 438, 446. 

 Vital functions, 9. 

 Vitelline, 39. 

 Vitis, 437, 438; F. bicolor, V. labrusea, 



Fig. 429. 



Vittaria, 246, 248. 

 Volvocaceas, 5, 13, 46, 49, 68, 94, 95, 96, 



97, 98, 100, 104, 109, 111, 495 ; structure 



and reproduction, 95-98. 

 Volvox, 8, 22, 96 ; F. minor, Fig. 67. 



Walchia, 535. 



Walking-fern (Camptosorus rhizophyl- 

 ZMS),20, 21, Fig. 11. 



Walnut (see also "Juglans ") ,416, 417,545. 



Washingtonia Jilifera, 386, 387. 



Washington-lily (Lilium Washingtonia- 

 num), 549. 



Waste products, 42, 43. 



Water, 6, 7, 34, 41, 42, 467, 469, 512; ab- 

 sorption of, 467 ; agent in transporta- 

 tion, 512: movement of , 469. 



Water-conducting tissues, 58. 



Water-cultures, 462. 



Water-fern (see " Hydropteridinese"). 



Water-hyacinth (see " Eichhornia"). 



Water-milfoil (see "Myriophyllum "). 



Water-mould (see " Saprolegnia"). 



Water-net (see also " Hydrodictyon ") , 

 46, 47, 99. 



Water-pollination (Hydrophily) , 370. 



Wax, 480. 



Welwitschia mirabilis, 344, 346. 



Wheat (Triticum vulgare), 175, 360, 385. 



Wheat-rust (see also "Puccinia"), 177, 

 179. 



White-elm (see " Ulmus Americana"). 



White-pine, 544. 



White-rust (see " Albugo "). 



Wild-oats (see " Avena"). 



Willow (see also " Salix "), 413, 415. 



Willow-herb (see "Epilobium "). 



Wilting, 466, 471. 



Wind, effect in growth, 489; wind polli- 

 nation (see " Anemophily "). 



Winter-bud, 26, 336, 362, 409, 505. 



Wistaria, 434, 543, 545. 



Wolffia, 389. 



Wood, wood cells, 52, 57, 58. 

 Woodwardia radicans, 257, Fig. 222. 



Xanthine, 39. 



Xanthophyll, 50, 473. 



Xerophyte, 24, 273, 362, 404, 501, 502, 527. 



Xylaria, 172. 



Xylem, 257, 298, 333, 470. 



Yam (see "Dioscorea"). 



Yeast (see also "Saccharomyces"), 60, 

 64, 165, 175, 479. 



Yellow-pine, 548. 



Yew (see "Taxus"). 



Yucca, 369, 373, 374, 375, 380, 390, 523, 

 524, 527, 546, 547; Y. aloifolia, Fig. 

 345; Y. arborescens, PI. VII; pollina- 

 tion of, 527 ; Y. Jilamentosa, 523. 



Zamia, 325, 326, 327, 329 ; Z. integrifolia, 



Figs, 289-291. 

 Zannichellia, 361, 370, 372, 374, 377, 381 ; 



Z. palustris, Figs. 341, 348, 354. 

 Zauschneria Californica, 525. 

 Zea Mays, 366, 376, Figs. 333, 347. 

 Zephyranthes, 391. 

 Zingioer, 377, 394, 395 ; Z. offidnalis, Fig. 



372. 



Zingiberaceae, 394, 395. 

 Zonate tetraspores, 139. 

 Zoogloea, 5. 

 Zoology, 9. 

 Zoospore, 15, 30, 39, 41, 46, 64, 93, 151, 



154, 188, 195, 491. 



Zostera, 348, 369, 370, 382, 515, 526. 

 Zygadenus, 549. 

 Zygnema, 36, 53. 

 Zygnemaceae, 108. 

 Zygochytrium aurantiacum, 153, Fig. 



117. 



Zygomycetes, 152. 

 Zygophyllaceae, 444. 

 Zygospore, 110, 161, 162; Entomophtho- 



rinea, 162; Mucor, 161 ; Spirogyra.110. 

 Zygote, 93. 



