Tulipa suaveolens— Veronica amplexicaulis 25 
Tulipa suaveolens 303 
Turraea 332 
Tussilago 611 
farfara 636 
Tylotus N. A. 248 
Typha 294 
— minima 294 
Udotea 34 
Ulota megalospora 734 
— obtusiuscula 734 
Ulotrichaceae 216, 217 
Ulotrichales 28, 30, 80, 151, 147 
Ulothrix 39, 132, 166. — N. A. 220 
implexa 147 
pseudoflacca Wille 26, 86 
sessilis 127 
— var. variabilis 127 
tenuissima 127 
zonata 90, 129, 264 
Ua 90, 92, Idi7, 159, Bu — io 
220 
aureola Ag. 211 
fasciata f. expansa Setchell 
— f. lobata Setchell 220 
— f. taeniata Setchell 220 
lactuca 90, 159 
Ulvella prostata Gardner 218 
Umbilicaria pustulata 590 
Umbilieus pendulinus 557 
Unearia 377, 392 
Urceolus N. A. 183 
Uredinopsis 266 
Urocystis cepulae 270 
Uroglena volvox 39 
Uroglenopsis americana (Calkins) 
Lemm. 61, 265 
apiculata 61 
Uragoga ipecacuanha 569 
Uromyces 268 
Urospora penicilliformis 135, 147 
Urtica 330 
— dioica 528, 566 
— pilulifera 296 
Urticaceae 481 
Usnea N. A. 18 
dasypoga (Ach.) Röhl. 5 
Ustilago 268 
avenae 266, 604 
— Heufleri 269 
220 
A. 
Ustilago zeae 601 
Utricularia 339, 381, 386, 387, 580 
(a vulgaris 352, 381, 393, 515, 543 
ı Uvella virescens Bory 182 
Vaceinium 418 
—- macrocarpum 359 
| — myrtillus 415, 455 
—- OXycoceus 359, 477 
— vitis idaea 455 
Vaillisneria 277 
— spiralis 469, 470 
Valonia 34. — N. A. 220 
aegagropila 164 
Valsa mali 358 
ı Vanda 453 
' Vanessa eardui 404 
— polycehroos 404 
ı Vaucheria 25, 81; 87, 89, 90, 94, 95, 
126, 305. — N. A. 220 
arrhyncha 89 
borealis Hirn var. minor Woronich.* 
150 
cruciata 81 
— var. pendula 81 
de Baryana 86, 512 
geminata 81 
— Goetz. var. pendula Götz. 81 
Woroniniana 81 
ı — — Heering var. pendula 220 
‚ Vaucheriopsis Heering N. G. 89, 221 
ja arrhyncha 89 
ı Veltheimia 255 
Venturia inaequalis 267, 268 
' Veratrum album 570 
Verbaseum 316 
' — phlomoides 290 
 Verbena supina 482 
ı Vernonieae 282, 457 
Veronica 284, 314, 336, 439 
SeCh“ 
sect. 
sect. 
SECH“ 
Beccabunga 285 
Chamaedrys 285 
Hebe 285 
Leptandra 285 
sect. Megasperma 285 
sect. Pseudolysimachia 285 
agrestis 285 
alpina 439 
amplexicaulis 336 
