612 , INDEX TO GENERA. 



Trigonella, 109. Ulmus, 368. Vicia, 119. 



Trinia, 190. Urtica, 367. Villarsia, 281. 



Triodia, 483. Utricularia, 331. Vinca, 275. 



Triticum, 501. Viola, 53. 



Trollius, 15. Vaccinium, 270. Viscum, 207. 



Tulipa, 398. Valeriana, 215. . Wahlenbergia, 266. 



Turritis, 43. V^lerianella, 216. Wolffia, 427. 



Tussilago, 254. Verbascum, 286. Woodsia, 508. 



Typha, 429. Verbena, 302. 



Veronica, 287. Zannichellia, 423. 



Ulex, 103. Viburnum, 208. Zostera, 424. 



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