332 



INDEX. 



Portulaca, 113 



PORTULACACEAE, 112 



Post-oak, 100 

 Potamogeton, 4 

 Potato Family, 237 

 Potentilla, 149 

 Poverty-grass, 21 

 Prairie-willow, 93 

 Prickly-ash, 175, 207 



Northern, 175 

 Prickly-lettuce, 316 

 Prickly-pear, 199 

 Prim, 224 



Primrose Family, 221 

 Primulaceae, 221 

 Primulales, 220 

 Prince 's-feather, 107 

 Prince 's-pine, 215 

 Privet, 224 

 Proboscis-flower, 267 

 Proserpinaca, 205 

 Prunella, 249 

 Prunus, 157 

 Puccoon, 242 

 Purple-milkweed, 230 

 Purple-willow, 93 

 Purslane, 113 



Marsh, 202 



Milk, 179 



Water, 202 

 Purslane Family, 112 

 Purslane-speedwell, 262 

 Pussley, 113 

 Putty-root, 90 

 Pyrola, 214 

 Pyrolaceae, 214 

 Pyrus, 153 



Quamoclit, 232 

 Queen-of-the-prairie, 151 

 Quercitron, 99 

 Quercus, 98 

 Quick-grass, 37 

 Quitch-grass, 37 



Eabbit-foot clover, 163 

 Radicula, 133 

 Eadish, 135 

 Ragweed, 283, 310 



Great, 283 

 Ragweed Family, 282 

 Ragwort, 310 

 Eam's-horn, 267 

 Ramsted, 258 

 Ran ALES, 118 

 Ranunculaceae, 119 

 Ranunculus, 122 

 Raphanus, 135 



Raspberry, 147 

 Black, 147 

 Flowering, 147 

 Red, 147 



Rattle-box, 161 



Rattlesnake-grass, 34 



Rattlesnake-plantain, 88 



Rattlesnake-root, 514 



Rattlesnake-weed, 315 



Red-birch, 97 



Reb-bud, 159 



Red-campion, 118 



Red-cedar, 3 



Red-clover, 163 



Red-elm, 104 



Red-maple, 185 



Red-mulberry, 103 



Red-oak, 99 



Red-raspberry, 147 



Red-root, 186 



Red-top, 26 



Reed bent-grass, 25 



Reed canary-grass, 20 



Reed-mace, 3 



Rhamnales, 186 



Rhamnus, 186 



Rhexia, 201 



Rhinanthaceae, 256 



Rhododendron, 217 



Rhus, 181 



Ribes, 144 



Rice cut-grass, 20 



Richweed, 102 



Ricinus, 178 



Ridan, 305 



Ripple-grass, 268 



River-birch, 97 



River-bulrush, 42 



Riverside-grape, 187 



River-weed, 141 



RivER-WEED Family, 141 



Robinia, 164 



Robin 's-plantain, 298' 



Rocket, 134 



Rock-geranium, 142 



Rock-maple, 185 



Rock-rose, 192 



RocK-ROSE Family, 192 



Roman-wormwood, 283 



Rosa, 152 



ROSACEAE, 145 



ROSALES, 140 



Rose, 152 



Corn, 118 



Cotton, 300 



Rock, 192 



"Wild, 122 

 Rose Family, 145 

 Rose-mallow, 190 



Rose-mallow, 



Halberd-leaved, 190 



Swamp, 190 

 Rose-pink, 225 

 Rosin-weed, 303 

 Rotala, 201 

 Rough-bedstraw, 273 

 Round-leaved orchis, 85 

 Rubacer, 147 

 rubiaceae, 270 

 Rubiales, 270 

 Rubus, 147 

 Rudbeckia, 304 

 Rue, 



Bell, 124 



Meadow, 124 

 Rue-anemone, 122 

 Rue Family, 175 

 Ruellia, 265 

 Rum-cherry, 158 

 Rumex, 105 

 Rush, 71 



Rush Family, 71 

 Rush-grass, 24 

 Rutaceae, 175 

 Rye-grass, 36 

 Rynchospora, 46 



Sabbatia, 225 

 Sabina, 3 

 Sage. 251 



Lyre-leaved, 251 



Wood, 246 

 Sagina, 114 

 Sagittaria, 7 

 St. Andrew 's-cross, 191 

 St. John 's-wort, 191 



Marsh, 192 



Shrubby, 192 

 St. John 's-wort Family, 



190 

 St. Peter 's-wort, 191 

 Salicaceae, 90 

 Salicales, 90 

 Salix, 91 

 Salsify, 317 

 Salvia, 251 

 Sambueus, 274 

 Samolus, 222 

 Sampson 's-snakeroot, 226 

 Sandalwood Family, 269 

 Sand-bar willow, 92 

 Sand-blackberry, 148 

 Sand-bur, 19 

 Sand-grape, 187 

 Sand-grass, 12 

 Sand-spur, 19 

 Saud-spurrv, 114 

 Sandwort, 114, 115 



