232 



INDEX OF GENERA. 



Solenia 175 



Solidago 47 



Sonchus 57, 132 



Sorastrum 213 



Sorghum 125 



Southbya 155 



Sparganium 100 



Spartina 119 



Specularia 58 



Speira 182 



Spergula 17 



Sphacelaria 208 



Sphserangium 141 



Sphaerella 202 



Spha>ria 200 



SphfBrobolus 178 



Spbperonema 179 



Sphreropsis 179 



Sphsrotheca 189 



Sphserozosma 215 



Sphterozyga 209,222 



Sphaguum 140 



Spberalcea 129 



Spiraea 28 



Spiranthes 95 



Spirogyra 214 



Sporidesminm 182 



Sporledera 141 



Sporobolus 117,133 



Sporocybe 186 



Sporodinia 189 



Sporotrichum 188 



Spyndia 206 



Staphylea 22 



Stachys 79,133 



Statice 61 



Staurastrum 219 



Staurospermum 215 



Steironema 62 



Steetzia 157 



Stellaria 16,126 



Stemonitis 177 



Stereocaulon 164 



Stereum 173 



Sticta 161 



Stictis 194 



Stigeocloneum 211 



Stilbospora 181 



Stilbum 185 



Stilophora 207 



Stipa 119 



Striaria 207 



Stropharia 169 



Sty losanthes 26 



Suseda 81 



Symphyosipbon 221 



Symphytum 67 



Symploca 222 



Symplocarpus 101 



Systegiurn 141 



Syzigites 189 



Tanacetum 52 



Taraxacum 56 



Taxus 93 



Tecoma '. 74 



Tephrosda 25 



Tetmemorus 217 



Tetraphis 145 



Tetraploa 182 



Tetraplodon 145 



Tetraspora 213 



Teucrium 75, 133 



Thalictrum 2 



Thamnium 151 



Tbaspiurn 39 



Thelepbora 173 



Tbelia 149 



Theloscbistes 160 



Tblaspi 10 



Thuidium 150 



Thuja 92 



Thymus 77 



Tiarella 33 



Tilia 19 



Timmia 147 



Tipularia 96 



Tofieldia 104 



Tolypothrix 221 



Torrubia 196 



Tortula 144 



Torula 182 



Tournefortia 132 



Tradescantia 107 



Trametes 172 



Trematodon 143 



Tremella 175 



Trianthema 130 



Triblidium 195 



Tribulus 129 



Trichia 178 



Tnchocolea 156 



Trichormus 222 



Trichostema 75 



Trichostomum 144 



Tncuspis 120 



Trientalis 61 



Trifolium 24,130 



Trillium 103 



Triosteum 42 



Tripsacum 125 



29 



Trisetum 123 



Triticum 122 



Trogia 170 



Trollius 3 



Trypethelium 167 



Tu'bercima 183 



Tubercularia 185 



Tussilago 46, 131 



Tympanis 194 



Typha 100 



Typhula 175 



U 



Ulex 129 



Ulmus 86 



Ulothrix 212 



Ulva 209 



Umbilicaria 161 



Uncinula 190 



Uniola 122 



Urceolaria 164 



Uredo 184 



Urocystis 184 



Uuromyces 184 



Urtica 86 



Usnea 160 



Ustilago 183 



Ustulina 197 



Utricularia 74 



Uvularia... . 103 



Vaccaria 14 



Vaccinium 58 



Valerianella, 131 



Vallisneria 93 



Valsa 198 



Vaucheria 212 



Venturia 202 



Veratrum 104 



Verbascum 70, 132 



Verbena 74 



Vermicularia 180 



Vernonia 44 



Veronica 72,126 



Verrucaria ... 167 



Vibrissia... 190 



Viburnum 42 



Vicia 26 



Vignea , 130 



Vilfa 117 



Vinca 63 



Viola... 11 



