362 



INDEX. 



Sabbatia, 247 

 Sagina, 129 

 Sag-ittaria, 9 

 Salicaceae, 98 

 Salicales, 98 

 Salix, 99 

 Salomonia, 86 

 Salsola, 121 

 Salvia, 269 

 Sanibucus, 293 

 Samolus, 243 

 Sanguinaria, 145 

 Sanguisorba, 172 

 Sanicula, 228 

 Santalaceae, 112 

 Santalales, 11 1 

 Sapindaceae, 206 

 Sapindales, 201 

 Saponaria, 127 

 Sarothra, 213 

 Sarracenia, 157 

 Sarraceniaceae, 157 

 Sarraceniales, 157 

 Sassafras, 143 

 Satureia, 270 

 Saururaceae, 98 

 Saururus, 98 

 Saxifragaceae, 160 

 Saxifraga, 160 

 Scandix, 229 

 Scheuchzeriaceae, 9 

 Scheuchzeria, 9 

 Scirpiis, 45 

 Scleranthaceae, 121 

 Scleranthus, 121 

 Scleria, 51 



Scrophulariaceae, 277 

 Scrophularia, 279 

 Scutellaria, 265 

 Sedum, 159 

 Senecio, 339 

 Sericocarpus, 318 

 Sesban, 185 

 Sherardia, 292 

 Sibbaldiopsis, 168 

 Sicyos, 299 

 Sida, 209 

 Silene, 126 

 Silphium, 329 

 Simarubaceae, 196 

 Sinapis, 151 

 Sisymbrium. 150 

 Sisyrinchium, 89 

 Sium, 231 

 Smilax, 87 

 Smilacaceae, 87 

 Solanaceae, 274 

 Solanum, 275 

 Solidago, 315 

 Sonchus, 303 

 Sophia, 156 

 Sorbaria, 165 

 Sorbus, 173 

 Sorghastrum, 16 

 Sorghum, 16 

 Sparganiaceae, 4 

 Sparganium, 4 



Spartina, 31 

 Spathyema, 73 

 Specularia, 300 

 Spergula, 130 

 Spermolepis, 233 

 Spiraea, 164 

 Spirodela, 74 

 Sporobolus, 26 

 Stachys, 268 

 Staphyleaceae, 205 

 Staphylea, 205 

 Steironema, 244 



[ Stenanthium, 81 

 Stenophragma, 151 

 Steuophyllus, 50 

 Stipa, 24 

 Streptopus, 85 

 Strophostyles, 190 

 Stylosanthes, 186 

 Stylophorum, 145 

 Symphoricarpos, 295 

 Symphytum, 261 

 Syndesmon, 138 

 Synosma, 339 



i Syntherisma, 17 



I Syringa, 245 



Taenidia, 231 



Talinum, 124 



Tanacetum, 337 

 I Taraxacum, 303 

 I Taxaceae, 4 

 ' Taxus, 4 



Tecoma, 287 



Teucrium, 264 



Thalesia, 286 



Thalictrum, 142 



Thaspium, 232 



Thlaspi, 149 



Thuja, 3 



Thymeleaceae, 219 



Thymeleales, 219 



Thymus, 271 



Tiarella. 160 



Tilia, 208 



Tiliaceae, 208 



Tillaea, 159 



Tipularia, 98 



Tissa, 130 



Torilis, 229 



Toxylon, no 



Tradescantia, 75 



Tragopogon, 303 



Trautvetteria, 139 



Triadenum, 213 



Trichostema, 264 



Tridens, 32 



Trientalis, 244 



Trifolium, 183 



Triglochin, 9 



Trilliaceae, 86 



Trillium, 87 



Triosteum, 294 



Triphora, 96 



Triplasis, 32 



Tripsacum, 15 



Trisetum, 30 



Trollius, 135 

 Tsuga, 3 

 Tulipa, 83 

 Tussilago, 338 

 Typhaceae, 4 

 Typha, 4 



Ulex, 182 

 Ulmaceae, in 

 Ulmaria, 171 

 Ulmus, III 

 Umbellales, 225 

 Umbelliferae, 226 

 Unifolium, 85 

 Uniola, 34 

 Urticaceae, 109 

 Urticales, 108 

 Urtica, 109 

 Urticastrum, 109 

 Utricularia, 285 

 Uvularia, 86 



Vaccaria, 127 

 Vacciniaceae, 240 

 Vaccinium, 241 

 Vagnera, 85 

 Valeriana, 297 

 Valerianaceae, 297 

 Valerianales, 297 

 Valerianella, 297 

 Vallisneria, 11 

 Veratrum, 81 

 Verbascum, 278 

 Verbenaceae, 261 

 Verbena, 261 

 Verbesina, 333 

 Vernonia, 311 

 Veronica, 281 

 Viburnum, 293 

 Vicia, 190 

 Vinca, 249 

 Vincetoxicum, 252 

 Violaceae, 215 

 Viola, 215 

 Vitaceae, 207 

 Vitis, 207 



Waldsteinia, 170 

 Washingtonia, 229 

 Willugbaeya, 314 

 Wolffia, 73 



Xanthium, 307 

 Xanthorrhiza, 135 

 Xanthoxylum, 195 

 Xolisma, 240 

 Xyridaceae, 74 

 Xyridales, 74 

 Xyris, 74 



Yucca, 84 



Zannichellia, 5 

 Zannichelliaceae, 5 

 Zizania, 23 

 Zizia, 230 



