INDEX 



1069 



Viruses, 361 

 Vitts, 856 



— quadrangtdaris, 810 

 Vivipary, 944 

 Volutin, 16, 275 

 Volva, 323, 333, 335 

 Volvocales, 55 

 Volvox, 67 



— reproduction, 70 



Volvox aureus, 6j, 68, 6g, yo, 71, 72 



— rousseletii, 68, ji 



Von Goebel, 830, 944, 946 

 Von Linne, Carl, 43, 44 

 Von Moh], Hugo, 8, 34, 784 

 Von Naegeli, Carl, 12, 784 



Walchia germanico, 6yg 

 Walnut, 909 

 Wart Disease, 203 

 Water Hyacinth, 805 



— stomata, 1017 

 Wax Palm, 1005 

 Weismann,_35, 451 

 Welwitschia ; anatomy of leaf, 770 

 of root, 770 



-of stern, 769 



— embryogeny, 778 



— female gametophyte, 776 

 strobilus, 774 



— inflorescences, 771 



— • male gametophyte, 776 



— ■ — strobilus, 771 



Wehvitschia mirabilis, 748, 749, 755, 756, 



760, 764, 765, 846, 975 

 White Rust of Crucifers, 235 



Whorls, 984 



Wildiers, 339 



Winged stems, 930 



Winter buds, 846 



Witches' Brooms, 356 



Wolff, Kaspar I'riedrich, 784, 832 



Wolffia arrhiza, 787 



W^ood ; types of, 903 



Woronin hypha, 288 



Wound cork, 879, 1024 



Xduthoria parietina, 368, 369, 370, 375 



Xeromorphy, 672, 736 



Xerophytes, 657 



X-rays, 12 



Xylaria, 290 



Xylem parenchyma, 467 



Yellows Disease of Hyacinths, 355 

 Yew, 698 

 Yucca, 912, 935 



Zalenski, (;6o 



Zalesskya, 532 



Zamia, 708, yog, 711, 714 



Zea iiiais, 823, 862, 866, 871, 1002, 1013 



Zehrina peiidula, 84^ 



Zimmermann, 636, 650, 651, 678, 832 



Zoidogamia, 637 



Zoopagaceae, 341 



Zygospore, 81 



Zygosaccharomyces, 280 



Zygote, 29 



