INDEX 



657 



Sphcnoptcris type, 580 

 ventral hairs, 



Metzgeria, 86 

 ventral lamellae 



Ricciocarpus, 40 

 ventral scales, 42 



Alarchantiacece, 43 

 Viscum, 504 

 Vittaria, 233, 393, 394 



walking fern, 310 

 water-absorption, 565, 566 

 water-conducting cells, 222 

 water-conduction, 565 

 water-conservation 



Marchantiaceae, 69 

 water supply, 229, 568 

 Webera nutans, lOo 

 Weisia, 218 



Woodwardia radicans ; Figs. 183, 

 184 



xerophytes, 230 



xerophytic Marchantiacea:;, 67 



Yucca, 553, 590 



Zamia, 321 



zoospores, 9, 8A 5^3, 564, 593 



zygote, 563, 5G6, 5G9 



