INDEX. 
445 
Sorghastrum, 20 
Sorghum, 20 
Sorrel, 107 
Sorrel, Mountain, 109 
Sourgrass, 220 
Sow-thistle, 411 
Spanish Bayonet, 85 
Spanish Lettuce, 126 
Spanish Needles, 375 
Sparganiace^e, 11 
Sparganium, 11 
Spartina, 35 
Spatularia, 174 
Specularia, 326 
Speedwell, 312 
Spermatophyta, 7 
Spheralcea, 230 
Spherostigma, 247 
Spiderwort, 75 
Spiderwort Family, 75 
Spike-grass, Marsh, 40 
Spikenard, Wild, 84 
Spike-rush, 59 
Spirea, 189 
Spiranthes, 89 
Spleenwort, 4 
Spondiace^e, 225 
Sporobolus, 27, 28, 29 
Spring Beauty, 125 
Spring Beauty, Water, 126 
Spring Lily ( Leucocrinum ) 
Spruces, 8 
Spurge, 222, 224 
Spurge Family, 222 
Squaw root ( Carum ) 
Squirrel-grass, 55 
Stachys, 297 
Staff-tree Family, 226 
Stanleya, 167 
Star of Bethlehem ( Leucocrinum ) 
Starwort, 127 
Starwort, Water, 225 
Steironema, 263 
Stenophragma, 159 
Stenosiphon, 247 
Stenotus, 345 
Stephanomeria, 403 
Stick-seed, 285 
Stink-grass, 38 
Stipa, 23 
Stitchwort, 127 
St. John’s Wort, 231 
St. John’s Wort Family, 231 
Stone-crop, 170 
Strawberry, 186 
Strawberry Blite, 116 
Strawberry Tomato, 300 
Streptanthus, 166 
Streptopus, 84 
Sueda, 120 
Suckleya, 118 
Sugar Corn, 20 
Sullivantia, 173 
Sumac, 226 
Sumac Family, 225 
Sun-flower, 373 
Svida, 249 
Swamp Laurel, 260 
Swamp Potato ( Sagittaria) 
Sweet Cicely, 251 
Sweet Clover, 202 
'Sweet Coltsfoot, 387 
Sweet Flag, 74 
Swertia, 267 
Switch-grass, 21 
Symphoricarpos, 323 
Syntherisma, 20 
Synthyris, 313 
Syringa, 176 
Talinum, 125 
Tansy-mustard, 157 
Tape-grass Family, 15 
Taraxacum, 409 
Taraxia, 247 
Tar-weed, 376 
Telesonix, 173 
Tellima, 171 
Tetradymia, 398 
Tetragoniace^e, 124 
Tetraneuris, 378 
Teucrium, 295 
Thalesia, 320 
Thalictrum, 147 
Thamnosma, 221 
Thaspium, 257 
Thelypodium, 166 
Thelesperma, 375 
Thermopsis, 197 
Thistle, 398 
Thistle, Russian, 20 
Thistle Family, 329 
Thlaspi, 152 
Thorough-wort, 335 
Thorn-apple, 303 
Thymeliales, 239 
Tickle-grass, 30 
Tick-seed, 374 
Tiger Lily, 83 
Tilled, 169 
Tilleastrum, 169 
Timothy, 28 
T iniaria, 113 
Tiorin, 30 
Tissa, 132 
Tithymalus, 224 
Tium, 204 
Toad-flax, 305 
Toad-flax, Bastard, 101 
Tobacco, 304 
