INDEX. 455 



Page. 



Red-root pigweed 326 



Red-seeded dandelion 442 



Red-topped sorrel 311 



Reticulate, in the form of network. 



Rhus toxicodendron 377 



Rhus vernix 377 



Rib-grass 410 



Rocket, sand 349 



Rocket, yellow 343 



Root, the descending axis which is destitute of leaves or nodes. 



Root stock, rizome, a stem usually subterranean and more or less thickened, producing young 

 branches. 



Rosaceae 356 



Rose family 356 



Rough pigweed 325, 326 



Rubiaceae 412 



Rudbeckia 436 



Rugel's broad-leaved plantain 411 



Runner, a prostrate branch which roots and forms new plants at intervals, as the strawberry. 



Rumex Acetosa 310 



Rumex Acetosella 311 



Rumex americanus 313 



Rumex crispus 312 



Rumex obtusifolia 314 



Rumex Patienta 315 



Rumex salicifolius 313 



Rush family 304 



Russian pigweed 317 



Russian thistle 323 



Rutabaga 345 



Rye 301 



Salsify 443 



Salsola 323 



Salt; to kill weeds 285 



Sandbur 294 



Sand plantain 409 



Sand rocket 349 



Sandwort 331 



Saponaria 333, 334 



Scabious 413 



Scarious, thin, dry, and membranous, not green. 



Scarlet clover 365 



Scleranthus 329 



Scokeroot 327 



Scrophulariceae 405 



Scutch grass 294 



Seaside spurge 376 



Secale 301 



Sedge 303 



Sedum 356 



Seed-control, first one 282 



Self-heal 401 



Senecio 437 



Serrulate, having minute antrorse teeth on the margin. See Serrate. 



Sessile, having no stem, as a leaf without a petiole or a flower without a pedicel. 



Setaria 302 



Sheep-bine " 390 



Sheep-sorrel 311 



Shepherd's purse 348 



Sherardia 412 



Side spinasa 381 



Silene 335, 336 



Silvery cinquefoil 358 



Sisymbrium 353, 354 



Skunk-grass 298 



Sleepy catchfly 335 



