557 



Volkmannia gracilis Stcrnb. 19^, 2b. 



Volvox globator L. 24, SI. 

 — • minor Stein. 24, bl. 



Vulpia Link. 7, 67, 9, 379. 



Wahlenbergia hederacea Rchb. 3, SO, 2m, 2b9; 5, 183, 201, iOI ; 7, 294; 

 10, 60, 72; 12, 401 ; 13, 518; 14, 70, 310; 17, 260, 265, 270, 

 271 ; 18% 101 ; 20% 137; 21% 64; 22, 137; 22% 26; 24, 357; 

 25% U3. 



Warea C.-B. Clarke. 21% 15, 209. 



Webera Hedw. 9, 136 (voir Pohlia). 



Weisia Hedw. 8, 112, 120; 9, 137; 10, 88. 



— Dicksoni Sch. 11, 6. 



— mucronata Bruch. 10, 88; 12, 215; 192,31 ; 21% 82, 234; 22% 30; 



23», 68; 24», 69. 



— viridula Brid. 4, 332 ; 8, 120, 138 ; 9, 130; 10, 196; 13, 296; 21% 



82; 22, 159; 22», 30, lli; 23% 27, 68 et v. amblyodon B. et S.; 

 24,17,327; 24% 67. 



V. densifolia Sch. 21% 82; 22% 30; 23% 68; 25% 121. 



V. stenocarpa Sch. 10, 196; 22% 68. 



Willbrandia villosa Cogn. 17, 291. 

 Xanthidium armatum Bréb . 25^, 

 162. 



— cristatum Bréb. 25^, 162. 



— fasciculatum Bréb. 25'^, 162. 

 Xanthium Toura. 17, 165; 22, 47. 



Willbrandia ebracteata Cogn, 17, 

 291. 



— linearis Cogn. 17, 291. 



— longibracteata Cogn. 17, 291. 



— verticillata Cogn. 17, 277, 

 279,291. 



Xanthium spinosum L. 1, 236; 3, 147; 6, 387; 9, II, 104, 105, 128, 414; 

 12, 406; 13, 516, 526; 14, 515; 15, 136; 16, 117, 239; 21% 41; 

 22, 42, 84, 98, 104, 109, 143; 24% 35, 194; 25% 90. 



— strumarium L. 4, 125; 5, 212; 7, 265; 9, 11, 104; 10, 225; 14, 55, 



82; 16, 46, 104, 117; 20, 222; 21% 41 ; 22, 84, 98, 109, 143; 



24%35;25, 237;25», 90. 

 Xanthoria parietina Th. Fr. 10, 210; 21% 198; 24, 23 et f. cA/oma, 



granulata et pulvinata Mass.; 24», 70, 139 et v. auréola Fr. 

 Xerospora sancta Sacc. 25, 157. 

 Xylaria coronata West. 2, 247, 253. 



— Hypoxylon Grev. 24, 34 et v. cupresiiformis Woodw. 



— pedunculata Tul. 23^, 14 v. pusilla Tul, 



— polymorpha Tul. 21% 201 ; 23% 28; 25, 147. 



— Tulasnei Nitsch. 23% 14, 164; 24, 58; 25, 147. 



