284 



INDEX. 



Page. 

 225 



Physalis 260 



Pike's expedition 2 



Pituophys 196 



Planorbis 226, 227 



Plantagenacese 264 



Plantago 264 



Pleuraphis 268 



Poa 269,272 



Poa 269 



Polanisia 248 



PolemoniaceaB 262 



Polygala 250,251 



Polygalaceae 250 



Polygonaceae 264 



Polyotus 258 



Polytsenia 255 



Pomotis 216 



Porphyritic greenstone 146 



Portulacacese 249 



Poterium 253 



Prairie dogs 43, 46, 59 



Prairie-dog towns 46 



Presents distributed 18 



Preston 89 



Preston, arrival at 5 



Prhnulaceae 262 



Prisoners, release of. 79 



Prisoners, Mexican 79 



Procyon 186 



Productus 175,176 



Prunus chicasa 19 



Psammophis 201 



Pseudoscorpionidae 24 1 



Psoralea 251 



Ptelea 250 



Pteromys 186 



Pupa muscorum 28 



Pure water — 64 



Pyrrbopappus 257 



Q. 



Quapaws 93 



Quercus 265 



Quercus macrocarpa 8 



Quicksand ... 7, 29 



R. 



Raft of Red river... 84 



Railroad, best route for 110, 112 



Railroad, general considerations 



respecting 109 



Rain .....13,14, 15,65 



Rains, times of occurrence 42 



Rana.... 214 



Ranunculaceae 248 



Rattlesnake 217 



Red clay formation 168 



Red river 13 



Red river, early explorations of 2 



Red river, its physical characters. 83 



Red river, position of sources 84 



Reptiles 188 



Reptiles collected 61 



Religious belief 107 



Retepora 175 



Rhus 250 



Rhynchosia 251 



Ribes 254 



Riddellia 256 



Ridddlia 256 



Rio Raijo of Humboldt 4 



Rise of river 44 



River terraces 90 



Rock bed of river 54 



Rock salt 91 



Rosaceae 253 



Rubiaceas 255 



Rudbeckia 256 



Rudbeckia 256 



Rush creek 80 



S. 



Sabbatia 259 



Safe return 82 



Sagacity of Indians 32 



San Diego - 116 



Sand-hills 16,90 



Sandy creek 39 



Salt Fork 21 



Salt, incrustation of. 35 



Salt springs 181 



Salt plains not at head of Red river 42 



Sanguisorba 253,271 



Santalaceae 262 



Sapindaceae 250 



Sapindus 250 



Sceleporus 207 



Scenery, magnificent 55 



Schrankia 253 



Schrankia angustata 44 



Scilla 266 



Scincus — 212 



Sciurus 186 



Scolopendra - 243 



Scoria 146 



Scorpio 238 



Scorpions 238 



Scorpionidae 238 



Scotophis 197 



Scrophulariaceae.. 260 



