424 
Sanicula, 185. 
Saponaria, 113. 
Sarothamnus, 137. 
Saussurea, 219. 
Saxifraga, 180. 
Scabiosa, 207. 
Scandix, 198. A 
Scheuchzeria, 341. 
Schoberia, 297. 
Schoenus, 358. 
Scilla, 334. 
Scirpus, 359. 
Scleranthus, 176. 
Sclerochloa, 394. 
Scolopendrium, 414. 
Scrophularia, 261. 
Scutellaria, 277. 
Sedum, 178. 
Senecio, 230. 
Serratula, 220. 
Seseli, 194. 
Sesleria, 388. 
Setaria, 381. 
Sherardia, 204. 
Sibbaldia, 157. 
Sibthorpia, 264. 
Silaus, 194. 
Silene, 113. 
Simethis, 335. 
Sinapis, 104. 
Sison, 188. 
Sisymbrium, 101. 
Sium, 190. 
INDEX TO GENERA. 
Smyrnium, 186. 
Solanum, 251. 
Solidago, 230. 
Sonchus, 211. 
Sparganium, 349. 
Spartina, 380. 
Spergula, 119. 
Spergularia, 120. 
Spireea, 156. 
Spiranthes, 320. 
Stachys, 275. 
Statice, 289. 
Stellaria, 122. 
Stratiotes, 338. 
Suda, 297. 
Subularia, 96. 
Symphytum, 281. 
Tamus, 337. 
Tanacetum, 235. 
Taraxacum, 218. 
Taxus, 320. 
Teesdalia, 94. 
Teucrium, 271. 
Thalictrum, 79. 
Thesium, 305. 
Thlaspi, 93. 
Thymus, 269. 
Tilia, 128. 
Tillea, 178. 
Tofieldia, 338. 
Tordylium, 196. 
Torilis, 197. 
Tragopogon, 207. 
Trichonema, 330. 
Trientalis, 286. 
Trifolium, 141. 
Triglochin, 340. 
Trigonella, 141. 
Trinia, 187. 
Triodia, 392. 
Triticum, 404, 
Trollius, 86. 
Turritis, 100. 
Tussilago, 229. 
Typha, 249. 
Ulex, 187. 
Ulmus, 310. 
Urtica, 309. 
Utricularia, 284. 
Vaccinium, 243. 
Valeriana, 205. 
Valerianella, 205. 
Verbascum, 252. 
Verbena, 266. 
Veronica, 254. 
Viburnum, 200. 
Vicia, 149. 
Villarsia, 249. 
Vinca, 246. 
Viola, 107. 
Viscum, 199. 
Wolffia, 348. 
Woodsia, 407.” 
Zannichellia, 346. 
Zostera, 346. 
