INDEX 



589 



Sneezeweed, Fine-leaved, 483 

 Purple-headed, 482 

 White, 487 

 Sneezewort, 481 

 Snow-on-the-mountain, 267 

 Soapwort, 149 

 Solanum carolinense, 365 

 Dulcamara, 363 

 elceagnifolium, 367 

 Solanum nigrum, 364 



rostratum, 368 

 Solidago canadensis, 425 

 graminifolia, 426 

 mollis, 424 

 nemoralis, 423 

 rigida, 426 

 Sonchus arvensis, 537 

 osper, 539 

 oleraceus, 538 

 Sorghum halepense, 22 

 Sorrel, Field, 95 

 Garden, 94 

 Horse, 95 

 Lady's, 256 

 Redtop, 95 

 Sheep, 95, 255 

 Tall, 94 

 Sowbane, 114 



Sow Thistle, Common, 538 

 Corn, 537 

 Creeping, 537 

 Field, 537 

 Spiny-leaved, 539 

 Spatling, 148 

 Spearmint, 362 

 Speckled John, 284 

 Specularia perfoliata, 408 

 Speedwell, Common, 383 

 Corn, 386 

 Field, 387 

 Garden, 387 

 Purslane, 385 

 Thyme-leaved, 385 

 Upland, 383 

 Spergula arvensis, 136 

 Spermacoce glabra, 399 

 Spinach, Strawberry, 110 

 Spiraea latifolia, 203 

 salidfolia, 204 

 tomentosa, 204 

 Sporobolus indicus, 47 

 neglectus, 47 



Sporobolus vaginiflorus, 46 

 Spurge, Creeping, 266 

 Cypress, 272 

 Flowering, 268 

 Hairy, 265 

 Leafy, 271 

 Pasture, 264 

 Spotted, 266 

 Stubble, 264 

 Sun, 272 



Thyme-leaved, 263 

 Toothed, 269 

 Upright Spotted, 264 

 Various-leaved, 270 

 White-margined, 267 

 Spurry, 136 

 Spurwort, 396 

 Squirrel-tail, 64 

 Stachys palustris, 357 

 Stagger Bush, 310 

 Stagger Weed, 162 

 Staggerwort, 506 

 Stammerwort, 455 

 Star Thistle, Purple, 517 



Yellow, 518 

 Starwort, 139 

 Grassy, 138 

 Yellow, 446 

 Steeple-bush, 204 

 Stellaria graminea, 138 



media, 139 



Stickseed, European, 334 

 Large-flowered, 335 

 Many-flowered, 336 

 Purple-stemmed, 375 

 Virginia, 334 

 Western, 335 

 Sticktight, 473 

 Sticky-stem, 291 

 Stinkweed, 488 

 Stinking Willie, 506 

 Stipa comata, 40 



spartea 39 

 Stipa, Western, 40 

 Stitchwort, Grass-leaved, 



Lesser, 138 



Stonecrop, Mossy, 200 

 Stork's-bill, 258 

 Strophostyles helvola, 253 

 pauciflora, 254 

 umbellata, 254 

 Succory, 525 



